621108738377 has 4 divisors (see below), whose sum is σ = 623105872896. Its totient is φ = 619111603860.

The previous prime is 621108738287. The next prime is 621108738389. The reversal of 621108738377 is 773837801126.

621108738377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 621108738377 - 2²⁶ = 621041629513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621108734377) 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, 998566793 + ... + 998567414.

It is an arithmetic number, because the mean of its divisors is an integer number (155776468224).

Almost surely, 2^621108738377 is an apocalyptic number.

It is an amenable number.

621108738377 is a deficient number, since it is larger than the sum of its proper divisors (1997134519).

621108738377 is a wasteful number, since it uses less digits than its factorization.

621108738377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997134518.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 621108738377 in words is "six hundred twenty-one billion, one hundred eight million, seven hundred thirty-eight thousand, three hundred seventy-seven".