721116862596 has 405 divisors, whose sum is σ = 2165737987413. Its totient is φ = 209103560640.

The previous prime is 721116862589. The next prime is 721116862607. The reversal of 721116862596 is 695268611127.

It is a happy number.

The square root of 721116862596 is 849186.

It is a perfect power (a square), and thus also a powerful number.

721116862596 is a `hidden beast` number, since 7 + 2 + 1 + 1 + 1 + 6 + 8 + 625 + 9 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 106674092100 + 614442770496 = 326610^2 + 783864^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 3775480861 + ... + 3775481051.

Almost surely, 2^721116862596 is an apocalyptic number.

721116862596 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

721116862596 is the 849186-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721116862596

721116862596 is an abundant number, since it is smaller than the sum of its proper divisors (1444621124817).

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

721116862596 is a wasteful number, since it uses less digits than its factorization.

721116862596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 228 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 721116862596 in words is "seven hundred twenty-one billion, one hundred sixteen million, eight hundred sixty-two thousand, five hundred ninety-six".