725021657776 has 40 divisors (see below), whose sum is σ = 1513245288464. Its totient is φ = 334523692800.

The previous prime is 725021657677. The next prime is 725021657783. The reversal of 725021657776 is 677756120527.

It is a super-3 number, since 3×725021657776³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158635 + ... + 1214581.

Almost surely, 2^725021657776 is an apocalyptic number.

It is an amenable number.

725021657776 is an abundant number, since it is smaller than the sum of its proper divisors (788223630688).

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

725021657776 is a wasteful number, since it uses less digits than its factorization.

725021657776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059269 (or 1059263 counting only the distinct ones).

The product of its (nonzero) digits is 8643600, while the sum is 55.

The spelling of 725021657776 in words is "seven hundred twenty-five billion, twenty-one million, six hundred fifty-seven thousand, seven hundred seventy-six".