77555509294945 has 16 divisors (see below), whose sum is σ = 102326639044608. Its totient is φ = 55959880717440.

The previous prime is 77555509294873. The next prime is 77555509294973. The reversal of 77555509294945 is 54949290555577.

It is not a de Polignac number, because 77555509294945 - 2⁷ = 77555509294817 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5551568484 + ... + 5551582453.

It is an arithmetic number, because the mean of its divisors is an integer number (6395414940288).

Almost surely, 2^{77555509294945} is an apocalyptic number.

It is an amenable number.

77555509294945 is a deficient number, since it is larger than the sum of its proper divisors (24771129749663).

77555509294945 is a wasteful number, since it uses less digits than its factorization.

77555509294945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11103151080.

The product of its (nonzero) digits is 3572100000, while the sum is 76.

The spelling of 77555509294945 in words is "seventy-seven trillion, five hundred fifty-five billion, five hundred nine million, two hundred ninety-four thousand, nine hundred forty-five".