621045540126 has 48 divisors (see below), whose sum is σ = 1507599510768. Its totient is φ = 183109248000.

The previous prime is 621045540119. The next prime is 621045540187.

621045540126 is a `hidden beast` number, since 6 + 2 + 104 + 5 + 540 + 1 + 2 + 6 = 666.

621045540126 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42379075 + ... + 42393726.

It is an arithmetic number, because the mean of its divisors is an integer number (31408323141).

Almost surely, 2^621045540126 is an apocalyptic number.

621045540126 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

621045540126 is an abundant number, since it is smaller than the sum of its proper divisors (886553970642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621045540126 is a wasteful number, since it uses less digits than its factorization.

621045540126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84772857 (or 84772854 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 621045540126 in words is "six hundred twenty-one billion, forty-five million, five hundred forty thousand, one hundred twenty-six".