612564261 has 4 divisors (see below), whose sum is σ = 816752352. Its totient is φ = 408376172.

The previous prime is 612564233. The next prime is 612564287. The reversal of 612564261 is 162465216.

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 612564261 - 2¹¹ = 612562213 is a prime.

It is a super-2 number, since 2×612564261² = 750469947708952242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612564761) 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, 102094041 + ... + 102094046.

It is an arithmetic number, because the mean of its divisors is an integer number (204188088).

Almost surely, 2^612564261 is an apocalyptic number.

It is an amenable number.

612564261 is a deficient number, since it is larger than the sum of its proper divisors (204188091).

612564261 is a wasteful number, since it uses less digits than its factorization.

612564261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204188090.

The product of its digits is 17280, while the sum is 33.

The square root of 612564261 is about 24750.0355757320. The cubic root of 612564261 is about 849.2793250171.

The spelling of 612564261 in words is "six hundred twelve million, five hundred sixty-four thousand, two hundred sixty-one".