621064253102 has 4 divisors (see below), whose sum is σ = 931596379656. Its totient is φ = 310532126550.

The previous prime is 621064253081. The next prime is 621064253119. The reversal of 621064253102 is 201352460126.

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

It is a super-2 number, since 2×621064253102² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155266063274 + ... + 155266063277.

It is an arithmetic number, because the mean of its divisors is an integer number (232899094914).

Almost surely, 2^621064253102 is an apocalyptic number.

621064253102 is a deficient number, since it is larger than the sum of its proper divisors (310532126554).

621064253102 is a wasteful number, since it uses less digits than its factorization.

621064253102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310532126553.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 621064253102 in words is "six hundred twenty-one billion, sixty-four million, two hundred fifty-three thousand, one hundred two".