30641866878 has 48 divisors (see below), whose sum is σ = 71566807824. Its totient is φ = 8720732160.

The previous prime is 30641866867. The next prime is 30641866919. The reversal of 30641866878 is 87866814603.

It is a Curzon number.

It is a congruent number.

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, 127213 + ... + 278328.

It is an arithmetic number, because the mean of its divisors is an integer number (1490975163).

Almost surely, 2^30641866878 is an apocalyptic number.

30641866878 is an abundant number, since it is smaller than the sum of its proper divisors (40924940946).

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

30641866878 is a wasteful number, since it uses less digits than its factorization.

30641866878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405817 (or 405810 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 30641866878 in words is "thirty billion, six hundred forty-one million, eight hundred sixty-six thousand, eight hundred seventy-eight".