49987791945 has 48 divisors (see below), whose sum is σ = 106640631552. Its totient is φ = 21093747840.

The previous prime is 49987791941. The next prime is 49987791977. The reversal of 49987791945 is 54919778994.

49987791945 is a `hidden beast` number, since 499 + 8 + 7 + 7 + 91 + 9 + 45 = 666.

It is not a de Polignac number, because 49987791945 - 2² = 49987791941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49987791941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6099421 + ... + 6107610.

It is an arithmetic number, because the mean of its divisors is an integer number (2221679824).

Almost surely, 2^49987791945 is an apocalyptic number.

49987791945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49987791945 is an abundant number, since it is smaller than the sum of its proper divisors (56652839607).

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

49987791945 is a wasteful number, since it uses less digits than its factorization.

49987791945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12207062 (or 12207059 counting only the distinct ones).

The product of its digits is 205752960, while the sum is 72.

The spelling of 49987791945 in words is "forty-nine billion, nine hundred eighty-seven million, seven hundred ninety-one thousand, nine hundred forty-five".