721752051364701 has 48 divisors (see below), whose sum is σ = 1203284036852352. Its totient is φ = 375647584158720.

The previous prime is 721752051364699. The next prime is 721752051364811. The reversal of 721752051364701 is 107463150257127.

It is not a de Polignac number, because 721752051364701 - 2¹ = 721752051364699 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721752051464701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1051537480 + ... + 1052223633.

It is an arithmetic number, because the mean of its divisors is an integer number (25068417434424).

Almost surely, 2^{721752051364701} is an apocalyptic number.

It is an amenable number.

721752051364701 is a deficient number, since it is larger than the sum of its proper divisors (481531985487651).

721752051364701 is a wasteful number, since it uses less digits than its factorization.

721752051364701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103761202 (or 2103761171 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 721752051364701 in words is "seven hundred twenty-one trillion, seven hundred fifty-two billion, fifty-one million, three hundred sixty-four thousand, seven hundred one".