49651928921 has 4 divisors (see below), whose sum is σ = 56745061632. Its totient is φ = 42558796212.

The previous prime is 49651928899. The next prime is 49651928939. The reversal of 49651928921 is 12982915694.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49651928921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49651928981) 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, 3546566345 + ... + 3546566358.

It is an arithmetic number, because the mean of its divisors is an integer number (14186265408).

Almost surely, 2^49651928921 is an apocalyptic number.

It is an amenable number.

49651928921 is a deficient number, since it is larger than the sum of its proper divisors (7093132711).

49651928921 is an equidigital number, since it uses as much as digits as its factorization.

49651928921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7093132710.

The product of its digits is 2799360, while the sum is 56.

The spelling of 49651928921 in words is "forty-nine billion, six hundred fifty-one million, nine hundred twenty-eight thousand, nine hundred twenty-one".