621850079409 has 16 divisors (see below), whose sum is σ = 892927698432. Its totient is φ = 382670644608.

The previous prime is 621850079381. The next prime is 621850079491. The reversal of 621850079409 is 904970058126.

It is not a de Polignac number, because 621850079409 - 2⁵ = 621850079377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621850079309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3580509 + ... + 3750165.

It is an arithmetic number, because the mean of its divisors is an integer number (55807981152).

Almost surely, 2^621850079409 is an apocalyptic number.

It is an amenable number.

621850079409 is a deficient number, since it is larger than the sum of its proper divisors (271077619023).

621850079409 is a wasteful number, since it uses less digits than its factorization.

621850079409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263656.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 621850079409 in words is "six hundred twenty-one billion, eight hundred fifty million, seventy-nine thousand, four hundred nine".