621637461157 has 8 divisors (see below), whose sum is σ = 623401509440. Its totient is φ = 619874065440.

The previous prime is 621637461121. The next prime is 621637461163. The reversal of 621637461157 is 751164736126.

It is a happy number.

621637461157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 621637461157 - 2²³ = 621629072549 is a prime.

It is a super-2 number, since 2×621637461157² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621637461157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621637462157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1777432 + ... + 2098222.

It is an arithmetic number, because the mean of its divisors is an integer number (77925188680).

Almost surely, 2^621637461157 is an apocalyptic number.

It is an amenable number.

621637461157 is a deficient number, since it is larger than the sum of its proper divisors (1764048283).

621637461157 is a wasteful number, since it uses less digits than its factorization.

621637461157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326283.

The product of its digits is 1270080, while the sum is 49.

The spelling of 621637461157 in words is "six hundred twenty-one billion, six hundred thirty-seven million, four hundred sixty-one thousand, one hundred fifty-seven".