77471641 has 8 divisors (see below), whose sum is σ = 84197960. Its totient is φ = 70854912.

The previous prime is 77471627. The next prime is 77471657. The reversal of 77471641 is 14617477.

It can be written as a sum of positive squares in 4 ways, for example, as 646416 + 76825225 = 804^2 + 8765^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77471641 - 2⁵ = 77471609 is a prime.

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 77471641.

It is not an unprimeable number, because it can be changed into a prime (77471621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25920 + ... + 28753.

It is an arithmetic number, because the mean of its divisors is an integer number (10524745).

Almost surely, 2^77471641 is an apocalyptic number.

It is an amenable number.

77471641 is a deficient number, since it is larger than the sum of its proper divisors (6726319).

77471641 is a wasteful number, since it uses less digits than its factorization.

77471641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54795.

The product of its digits is 32928, while the sum is 37.

The square root of 77471641 is about 8801.7976004905. The cubic root of 77471641 is about 426.2989390065.

The spelling of 77471641 in words is "seventy-seven million, four hundred seventy-one thousand, six hundred forty-one".