721876020006 has 32 divisors (see below), whose sum is σ = 1490910336000. Its totient is φ = 232771724640.

The previous prime is 721876019971. The next prime is 721876020007. The reversal of 721876020006 is 600020678127.

It is a super-2 number, since 2×721876020006² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721876020007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287176 + ... + 1235403.

It is an arithmetic number, because the mean of its divisors is an integer number (46590948000).

Almost surely, 2^721876020006 is an apocalyptic number.

721876020006 is an abundant number, since it is smaller than the sum of its proper divisors (769034315994).

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

721876020006 is a wasteful number, since it uses less digits than its factorization.

721876020006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525164.

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 721876020006 in words is "seven hundred twenty-one billion, eight hundred seventy-six million, twenty thousand, six".