77911388073 has 24 divisors (see below), whose sum is σ = 116588449536. Its totient is φ = 50083898400.

The previous prime is 77911388069. The next prime is 77911388083. The reversal of 77911388073 is 37088311977.

It is a happy number.

It is not a de Polignac number, because 77911388073 - 2² = 77911388069 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77911388033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426783 + ... + 581348.

It is an arithmetic number, because the mean of its divisors is an integer number (4857852064).

Almost surely, 2^77911388073 is an apocalyptic number.

It is an amenable number.

77911388073 is a deficient number, since it is larger than the sum of its proper divisors (38677061463).

77911388073 is a wasteful number, since it uses less digits than its factorization.

77911388073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008445 (or 1008442 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 77911388073 in words is "seventy-seven billion, nine hundred eleven million, three hundred eighty-eight thousand, seventy-three".