34215511878 has 24 divisors (see below), whose sum is σ = 75177747216. Its totient is φ = 11244534000.

The previous prime is 34215511877. The next prime is 34215511901. The reversal of 34215511878 is 87811551243.

34215511878 is a `hidden beast` number, since 3 + 4 + 21 + 551 + 1 + 8 + 78 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34215511877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13385073 + ... + 13387628.

It is an arithmetic number, because the mean of its divisors is an integer number (3132406134).

Almost surely, 2^34215511878 is an apocalyptic number.

34215511878 is an abundant number, since it is smaller than the sum of its proper divisors (40962235338).

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

34215511878 is a wasteful number, since it uses less digits than its factorization.

34215511878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26772780 (or 26772777 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The spelling of 34215511878 in words is "thirty-four billion, two hundred fifteen million, five hundred eleven thousand, eight hundred seventy-eight".