765988649055 has 32 divisors (see below), whose sum is σ = 1556294400000. Its totient is φ = 350166239136.

The previous prime is 765988649011. The next prime is 765988649117. The reversal of 765988649055 is 550946889567.

765988649055 is a `hidden beast` number, since 7 + 6 + 5 + 9 + 8 + 86 + 490 + 55 = 666.

It is not a de Polignac number, because 765988649055 - 2¹⁶ = 765988583519 is a prime.

It is a super-2 number, since 2×765988649055² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405284055 + ... + 405285944.

It is an arithmetic number, because the mean of its divisors is an integer number (48634200000).

Almost surely, 2^765988649055 is an apocalyptic number.

765988649055 is an abundant number, since it is smaller than the sum of its proper divisors (790305750945).

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

765988649055 is a wasteful number, since it uses less digits than its factorization.

765988649055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810570020 (or 810570014 counting only the distinct ones).

The product of its (nonzero) digits is 653184000, while the sum is 72.

The spelling of 765988649055 in words is "seven hundred sixty-five billion, nine hundred eighty-eight million, six hundred forty-nine thousand, fifty-five".