49930916561 has 4 divisors (see below), whose sum is σ = 49931376624. Its totient is φ = 49930456500.

The previous prime is 49930916551. The next prime is 49930916579. The reversal of 49930916561 is 16561903994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 49930916561 - 2²² = 49926722257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49930916551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33086 + ... + 317736.

It is an arithmetic number, because the mean of its divisors is an integer number (12482844156).

Almost surely, 2^49930916561 is an apocalyptic number.

It is an amenable number.

49930916561 is a deficient number, since it is larger than the sum of its proper divisors (460063).

49930916561 is a wasteful number, since it uses less digits than its factorization.

49930916561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460062.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 49930916561 in words is "forty-nine billion, nine hundred thirty million, nine hundred sixteen thousand, five hundred sixty-one".