77156334040 has 32 divisors (see below), whose sum is σ = 174868930080. Its totient is φ = 30637257472.

The previous prime is 77156334001. The next prime is 77156334041. The reversal of 77156334040 is 4043365177.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 77156333984 and 77156334002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77156334041) 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 7 ways as a sum of consecutive naturals, for example, 7034332 + ... + 7045291.

It is an arithmetic number, because the mean of its divisors is an integer number (5464654065).

Almost surely, 2^77156334040 is an apocalyptic number.

It is an amenable number.

77156334040 is an abundant number, since it is smaller than the sum of its proper divisors (97712596040).

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

77156334040 is a wasteful number, since it uses less digits than its factorization.

77156334040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14079771 (or 14079767 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 77156334040 in words is "seventy-seven billion, one hundred fifty-six million, three hundred thirty-four thousand, forty".