721532731050607 has 6 divisors (see below), whose sum is σ = 839333993263008. Its totient is φ = 618456626614764.

The previous prime is 721532731050563. The next prime is 721532731050611. The reversal of 721532731050607 is 706050137235127.

It is not a de Polignac number, because 721532731050607 - 2¹¹ = 721532731048559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 14725157776543 = 721532731050607 / (7 + 2 + 1 + 5 + 3 + 2 + 7 + 3 + 1 + 0 + 5 + 0 + 6 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721532731050617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7362578888223 + ... + 7362578888320.

It is an arithmetic number, because the mean of its divisors is an integer number (139888998877168).

Almost surely, 2^{721532731050607} is an apocalyptic number.

721532731050607 is a deficient number, since it is larger than the sum of its proper divisors (117801262212401).

721532731050607 is a wasteful number, since it uses less digits than its factorization.

721532731050607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14725157776557 (or 14725157776550 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 49.

The spelling of 721532731050607 in words is "seven hundred twenty-one trillion, five hundred thirty-two billion, seven hundred thirty-one million, fifty thousand, six hundred seven".