77533325556 has 48 divisors (see below), whose sum is σ = 181294977024. Its totient is φ = 25789664736.

The previous prime is 77533325549. The next prime is 77533325563. The reversal of 77533325556 is 65552333577.

It is an interprime number because it is at equal distance from previous prime (77533325549) and next prime (77533325563).

It is a super-2 number, since 2×77533325556² (a number of 23 digits) contains 22 as substring.

Its product of digits (9922500) is a multiple of the sum of its prime divisors (7938).

It is a junction number, because it is equal to n+sod(n) for n = 77533325499 and 77533325508.

It is a congruent number.

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, 13497621 + ... + 13503363.

It is an arithmetic number, because the mean of its divisors is an integer number (3776978688).

Almost surely, 2^77533325556 is an apocalyptic number.

It is an amenable number.

77533325556 is an abundant number, since it is smaller than the sum of its proper divisors (103761651468).

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

77533325556 is a wasteful number, since it uses less digits than its factorization.

77533325556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7940 (or 7938 counting only the distinct ones).

The product of its digits is 9922500, while the sum is 51.

The spelling of 77533325556 in words is "seventy-seven billion, five hundred thirty-three million, three hundred twenty-five thousand, five hundred fifty-six".