49831149978 has 48 divisors (see below), whose sum is σ = 110175260832. Its totient is φ = 16272900000.

The previous prime is 49831149947. The next prime is 49831150003. The reversal of 49831149978 is 87994113894.

49831149978 is a `hidden beast` number, since 49 + 8 + 31 + 1 + 499 + 78 = 666.

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, 185193 + ... + 366003.

It is an arithmetic number, because the mean of its divisors is an integer number (2295317934).

Almost surely, 2^49831149978 is an apocalyptic number.

49831149978 is an abundant number, since it is smaller than the sum of its proper divisors (60344110854).

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

49831149978 is a wasteful number, since it uses less digits than its factorization.

49831149978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181131 (or 181128 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

It can be divided in two parts, 49831 and 149978, that added together give a square (199809 = 447²).

The spelling of 49831149978 in words is "forty-nine billion, eight hundred thirty-one million, one hundred forty-nine thousand, nine hundred seventy-eight".