78627787940 has 48 divisors (see below), whose sum is σ = 178084382448. Its totient is φ = 28988596224.

The previous prime is 78627787937. The next prime is 78627787961. The reversal of 78627787940 is 4978772687.

It can be written as a sum of positive squares in 8 ways, for example, as 26957042596 + 51670745344 = 164186^2 + 227312^2 .

It is a super-3 number, since 3×78627787940³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

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, 49697 + ... + 399656.

It is an arithmetic number, because the mean of its divisors is an integer number (3710091301).

Almost surely, 2^78627787940 is an apocalyptic number.

It is an amenable number.

78627787940 is an abundant number, since it is smaller than the sum of its proper divisors (99456594508).

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

78627787940 is a wasteful number, since it uses less digits than its factorization.

78627787940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450048 (or 450046 counting only the distinct ones).

The product of its (nonzero) digits is 66382848, while the sum is 65.

The spelling of 78627787940 in words is "seventy-eight billion, six hundred twenty-seven million, seven hundred eighty-seven thousand, nine hundred forty".