721654052425626 has 64 divisors (see below), whose sum is σ = 1531174548942720. Its totient is φ = 225962014464000.

The previous prime is 721654052425583. The next prime is 721654052425633. The reversal of 721654052425626 is 626524250456127.

It is a super-2 number, since 2×721654052425626² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316739001 + ... + 319009251.

It is an arithmetic number, because the mean of its divisors is an integer number (23924602327230).

Almost surely, 2^{721654052425626} is an apocalyptic number.

721654052425626 is an abundant number, since it is smaller than the sum of its proper divisors (809520496517094).

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

721654052425626 is a wasteful number, since it uses less digits than its factorization.

721654052425626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276319.

The product of its (nonzero) digits is 48384000, while the sum is 57.

The spelling of 721654052425626 in words is "seven hundred twenty-one trillion, six hundred fifty-four billion, fifty-two million, four hundred twenty-five thousand, six hundred twenty-six".