621904131262 has 4 divisors (see below), whose sum is σ = 932856196896. Its totient is φ = 310952065630.

The previous prime is 621904131209. The next prime is 621904131263. The reversal of 621904131262 is 262131409126.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621904131263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155476032814 + ... + 155476032817.

It is an arithmetic number, because the mean of its divisors is an integer number (233214049224).

Almost surely, 2^621904131262 is an apocalyptic number.

621904131262 is a deficient number, since it is larger than the sum of its proper divisors (310952065634).

621904131262 is a wasteful number, since it uses less digits than its factorization.

621904131262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310952065633.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 621904131262 in words is "six hundred twenty-one billion, nine hundred four million, one hundred thirty-one thousand, two hundred sixty-two".