78354434034 has 24 divisors (see below), whose sum is σ = 169822457532. Its totient is φ = 26109757440.

The previous prime is 78354434027. The next prime is 78354434047. The reversal of 78354434034 is 43043445387.

78354434034 is a `hidden beast` number, since 78 + 3 + 544 + 3 + 4 + 0 + 34 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55741793409 + 22612640625 = 236097^2 + 150375^2 .

It is a super-2 number, since 2×78354434034² (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 11 ways as a sum of consecutive naturals, for example, 641199 + ... + 753554.

Almost surely, 2^78354434034 is an apocalyptic number.

78354434034 is an abundant number, since it is smaller than the sum of its proper divisors (91468023498).

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

78354434034 is a wasteful number, since it uses less digits than its factorization.

78354434034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397882 (or 1397879 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 45.

The spelling of 78354434034 in words is "seventy-eight billion, three hundred fifty-four million, four hundred thirty-four thousand, thirty-four".