77611879542 has 32 divisors (see below), whose sum is σ = 162810911232. Its totient is φ = 24635854944.

The previous prime is 77611879523. The next prime is 77611879549. The reversal of 77611879542 is 24597811677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77611879549) 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, 3708748 + ... + 3729615.

It is an arithmetic number, because the mean of its divisors is an integer number (5087840976).

Almost surely, 2^77611879542 is an apocalyptic number.

77611879542 is an abundant number, since it is smaller than the sum of its proper divisors (85199031690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77611879542 is a wasteful number, since it uses less digits than its factorization.

77611879542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438452.

The product of its digits is 5927040, while the sum is 57.

The spelling of 77611879542 in words is "seventy-seven billion, six hundred eleven million, eight hundred seventy-nine thousand, five hundred forty-two".