621142676154 has 192 divisors, whose sum is σ = 1886388497280. Its totient is φ = 148925226240.

The previous prime is 621142676149. The next prime is 621142676191. The reversal of 621142676154 is 451676241126.

621142676154 is a `hidden beast` number, since 6 + 2 + 1 + 1 + 4 + 26 + 7 + 615 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 442419 + ... + 1199174.

It is an arithmetic number, because the mean of its divisors is an integer number (9824940090).

Almost surely, 2^621142676154 is an apocalyptic number.

621142676154 is an abundant number, since it is smaller than the sum of its proper divisors (1265245821126).

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

621142676154 is a wasteful number, since it uses less digits than its factorization.

621142676154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641642 (or 1641629 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 621142676154 in words is "six hundred twenty-one billion, one hundred forty-two million, six hundred seventy-six thousand, one hundred fifty-four".