78837505810 has 48 divisors (see below), whose sum is σ = 165242680344. Its totient is φ = 27002723328.

The previous prime is 78837505759. The next prime is 78837505823. The reversal of 78837505810 is 1850573887.

It can be written as a sum of positive squares in 4 ways, for example, as 78443125929 + 394379881 = 280077^2 + 19859^2 .

It is a super-2 number, since 2×78837505810² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407842 + ... + 569218.

Almost surely, 2^78837505810 is an apocalyptic number.

78837505810 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78837505810 is an abundant number, since it is smaller than the sum of its proper divisors (86405174534).

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

78837505810 is a wasteful number, since it uses less digits than its factorization.

78837505810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162395 (or 162388 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 52.

The spelling of 78837505810 in words is "seventy-eight billion, eight hundred thirty-seven million, five hundred five thousand, eight hundred ten".