78952961378 has 16 divisors (see below), whose sum is σ = 118784656440. Its totient is φ = 39358176000.

The previous prime is 78952961363. The next prime is 78952961387. The reversal of 78952961378 is 87316925987.

It can be written as a sum of positive squares in 4 ways, for example, as 77814776209 + 1138185169 = 278953^2 + 33737^2 .

It is a super-2 number, since 2×78952961378² (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 7 ways as a sum of consecutive naturals, for example, 1635548 + ... + 1683128.

Almost surely, 2^78952961378 is an apocalyptic number.

78952961378 is a deficient number, since it is larger than the sum of its proper divisors (39831695062).

78952961378 is a wasteful number, since it uses less digits than its factorization.

78952961378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50053.

The product of its digits is 45722880, while the sum is 65.

The spelling of 78952961378 in words is "seventy-eight billion, nine hundred fifty-two million, nine hundred sixty-one thousand, three hundred seventy-eight".