621622023655 has 16 divisors (see below), whose sum is σ = 771725541600. Its totient is φ = 480114069120.

The previous prime is 621622023653. The next prime is 621622023683. The reversal of 621622023655 is 556320226126.

It is not a de Polignac number, because 621622023655 - 2¹ = 621622023653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621622023653) 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 in 15 ways as a sum of consecutive naturals, for example, 1911316 + ... + 2212774.

It is an arithmetic number, because the mean of its divisors is an integer number (48232846350).

Almost surely, 2^621622023655 is an apocalyptic number.

621622023655 is a deficient number, since it is larger than the sum of its proper divisors (150103517945).

621622023655 is a wasteful number, since it uses less digits than its factorization.

621622023655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315714.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 621622023655 in words is "six hundred twenty-one billion, six hundred twenty-two million, twenty-three thousand, six hundred fifty-five".