621634635542 has 16 divisors (see below), whose sum is σ = 946166614272. Its totient is φ = 306251148840.

The previous prime is 621634635431. The next prime is 621634635647. The reversal of 621634635542 is 245536436126.

621634635542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1114298 + ... + 1576365.

It is an arithmetic number, because the mean of its divisors is an integer number (59135413392).

Almost surely, 2^621634635542 is an apocalyptic number.

621634635542 is a deficient number, since it is larger than the sum of its proper divisors (324531978730).

621634635542 is a wasteful number, since it uses less digits than its factorization.

621634635542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692363.

The product of its digits is 3110400, while the sum is 47.

The spelling of 621634635542 in words is "six hundred twenty-one billion, six hundred thirty-four million, six hundred thirty-five thousand, five hundred forty-two".