780625781120 has 64 divisors (see below), whose sum is σ = 1870981491600. Its totient is φ = 311447513088.

The previous prime is 780625781093. The next prime is 780625781167. The reversal of 780625781120 is 21187526087.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×780625781120² (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 7 ways as a sum of consecutive naturals, for example, 1318814 + ... + 1816733.

Almost surely, 2^780625781120 is an apocalyptic number.

It is an amenable number.

780625781120 is an abundant number, since it is smaller than the sum of its proper divisors (1090355710480).

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

780625781120 is a wasteful number, since it uses less digits than its factorization.

780625781120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135955 (or 3135943 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 780625781120 in words is "seven hundred eighty billion, six hundred twenty-five million, seven hundred eighty-one thousand, one hundred twenty".