851651461 has 4 divisors (see below), whose sum is σ = 863646624. Its totient is φ = 839656300.

The previous prime is 851651453. The next prime is 851651473. The reversal of 851651461 is 164156158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 851651461 - 2³ = 851651453 is a prime.

It is a super-2 number, since 2×851651461² = 1450620422046869042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851651461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851651441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5997475 + ... + 5997616.

It is an arithmetic number, because the mean of its divisors is an integer number (215911656).

Almost surely, 2^851651461 is an apocalyptic number.

It is an amenable number.

851651461 is a deficient number, since it is larger than the sum of its proper divisors (11995163).

851651461 is a wasteful number, since it uses less digits than its factorization.

851651461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11995162.

The product of its digits is 28800, while the sum is 37.

The square root of 851651461 is about 29183.0680532394. The cubic root of 851651461 is about 947.8813213045.

The spelling of 851651461 in words is "eight hundred fifty-one million, six hundred fifty-one thousand, four hundred sixty-one".