621421512446 has 8 divisors (see below), whose sum is σ = 1065294021360. Its totient is φ = 266323505328.

The previous prime is 621421512433. The next prime is 621421512461. The reversal of 621421512446 is 644215124126.

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

It is a super-2 number, since 2×621421512446² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22193625431 + ... + 22193625458.

It is an arithmetic number, because the mean of its divisors is an integer number (133161752670).

Almost surely, 2^621421512446 is an apocalyptic number.

621421512446 is a deficient number, since it is larger than the sum of its proper divisors (443872508914).

621421512446 is a wasteful number, since it uses less digits than its factorization.

621421512446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44387250898.

The product of its digits is 92160, while the sum is 38.

The spelling of 621421512446 in words is "six hundred twenty-one billion, four hundred twenty-one million, five hundred twelve thousand, four hundred forty-six".