77918946552 has 48 divisors (see below), whose sum is σ = 211587363000. Its totient is φ = 25904442816.

The previous prime is 77918946529. The next prime is 77918946557. The reversal of 77918946552 is 25564981977.

77918946552 is a `hidden beast` number, since 7 + 7 + 91 + 89 + 465 + 5 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 77918946552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77918946557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1400427 + ... + 1455002.

Almost surely, 2^77918946552 is an apocalyptic number.

77918946552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

77918946552 is an abundant number, since it is smaller than the sum of its proper divisors (133668416448).

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

77918946552 is a wasteful number, since it uses less digits than its factorization.

77918946552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855820 (or 2855813 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 63.

The spelling of 77918946552 in words is "seventy-seven billion, nine hundred eighteen million, nine hundred forty-six thousand, five hundred fifty-two".