721534266116730 has 48 divisors (see below), whose sum is σ = 2046533554806624. Its totient is φ = 174917397846240.

The previous prime is 721534266116717. The next prime is 721534266116743. The reversal of 721534266116730 is 37611662435127.

721534266116730 is a `hidden beast` number, since 7 + 2 + 1 + 53 + 426 + 6 + 1 + 167 + 3 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (721534266116717) and next prime (721534266116743).

It is a super-2 number, since 2×721534266116730² (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 23 ways as a sum of consecutive naturals, for example, 364411244524 + ... + 364411246503.

It is an arithmetic number, because the mean of its divisors is an integer number (42636115725138).

Almost surely, 2^{721534266116730} is an apocalyptic number.

721534266116730 is an abundant number, since it is smaller than the sum of its proper divisors (1324999288689894).

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

721534266116730 is a wasteful number, since it uses less digits than its factorization.

721534266116730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728822491051 (or 728822491048 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 721534266116730 in words is "seven hundred twenty-one trillion, five hundred thirty-four billion, two hundred sixty-six million, one hundred sixteen thousand, seven hundred thirty".