77637132162561 has 16 divisors (see below), whose sum is σ = 105704209958400. Its totient is φ = 50668421207040.

The previous prime is 77637132162547. The next prime is 77637132162563. The reversal of 77637132162561 is 16526123173677.

It is not a de Polignac number, because 77637132162561 - 2⁵ = 77637132162529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77637132162563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543674545 + ... + 543817326.

It is an arithmetic number, because the mean of its divisors is an integer number (6606513122400).

Almost surely, 2^{77637132162561} is an apocalyptic number.

It is an amenable number.

77637132162561 is a deficient number, since it is larger than the sum of its proper divisors (28067077795839).

77637132162561 is a wasteful number, since it uses less digits than its factorization.

77637132162561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087492376.

The product of its digits is 13335840, while the sum is 57.

The spelling of 77637132162561 in words is "seventy-seven trillion, six hundred thirty-seven billion, one hundred thirty-two million, one hundred sixty-two thousand, five hundred sixty-one".