721534265401116 has 192 divisors, whose sum is σ = 1755558958285440. Its totient is φ = 230505483386880.

The previous prime is 721534265401009. The next prime is 721534265401153. The reversal of 721534265401116 is 611104562435127.

It is a super-2 number, since 2×721534265401116² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12110110446 + ... + 12110170026.

It is an arithmetic number, because the mean of its divisors is an integer number (9143536241070).

Almost surely, 2^{721534265401116} is an apocalyptic number.

It is an amenable number.

721534265401116 is an abundant number, since it is smaller than the sum of its proper divisors (1034024692884324).

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

721534265401116 is a wasteful number, since it uses less digits than its factorization.

721534265401116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62216 (or 62214 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 721534265401116 in words is "seven hundred twenty-one trillion, five hundred thirty-four billion, two hundred sixty-five million, four hundred one thousand, one hundred sixteen".