78551249862 has 16 divisors (see below), whose sum is σ = 160066698480. Its totient is φ = 25689716832.

The previous prime is 78551249851. The next prime is 78551249929. The reversal of 78551249862 is 26894215587.

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, 123507937 + ... + 123508572.

It is an arithmetic number, because the mean of its divisors is an integer number (10004168655).

Almost surely, 2^78551249862 is an apocalyptic number.

78551249862 is an abundant number, since it is smaller than the sum of its proper divisors (81515448618).

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

78551249862 is a wasteful number, since it uses less digits than its factorization.

78551249862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247016567.

The product of its digits is 9676800, while the sum is 57.

The spelling of 78551249862 in words is "seventy-eight billion, five hundred fifty-one million, two hundred forty-nine thousand, eight hundred sixty-two".