621406120474 has 8 divisors (see below), whose sum is σ = 932130509940. Its totient is φ = 310695950496.

The previous prime is 621406120421. The next prime is 621406120477. The reversal of 621406120474 is 474021604126.

It can be written as a sum of positive squares in 2 ways, for example, as 572738672025 + 48667448449 = 756795^2 + 220607^2 .

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

It is a super-2 number, since 2×621406120474² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621406120477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3444939 + ... + 3620830.

Almost surely, 2^621406120474 is an apocalyptic number.

621406120474 is a deficient number, since it is larger than the sum of its proper divisors (310724389466).

621406120474 is a wasteful number, since it uses less digits than its factorization.

621406120474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7109744.

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 621406120474 in words is "six hundred twenty-one billion, four hundred six million, one hundred twenty thousand, four hundred seventy-four".