50977438621 has 4 divisors (see below), whose sum is σ = 51675759772. Its totient is φ = 50279117472.

The previous prime is 50977438609. The next prime is 50977438639. The reversal of 50977438621 is 12683477905.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22257357721 + 28720080900 = 149189^2 + 169470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50977438621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50977438651) 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, 349160466 + ... + 349160611.

It is an arithmetic number, because the mean of its divisors is an integer number (12918939943).

It is a 1-persistent number, because it is pandigital, but 2⋅50977438621 = 101954877242 is not.

Almost surely, 2^50977438621 is an apocalyptic number.

It is an amenable number.

50977438621 is a deficient number, since it is larger than the sum of its proper divisors (698321151).

50977438621 is an equidigital number, since it uses as much as digits as its factorization.

50977438621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698321150.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 50977438621 in words is "fifty billion, nine hundred seventy-seven million, four hundred thirty-eight thousand, six hundred twenty-one".