721524053376325 has 24 divisors (see below), whose sum is σ = 916595712010440. Its totient is φ = 563088999398400.

The previous prime is 721524053376311. The next prime is 721524053376397. The reversal of 721524053376325 is 523673350425127.

721524053376325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 710465515484481 + 11058537891844 = 26654559^2 + 3325438^2 .

It is not a de Polignac number, because 721524053376325 - 2¹⁹ = 721524052852037 is a prime.

It is a congruent number.

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, 21161574 + ... + 43484023.

It is an arithmetic number, because the mean of its divisors is an integer number (38191488000435).

Almost surely, 2^{721524053376325} is an apocalyptic number.

It is an amenable number.

721524053376325 is a deficient number, since it is larger than the sum of its proper divisors (195071658634115).

721524053376325 is a wasteful number, since it uses less digits than its factorization.

721524053376325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64656537 (or 64656532 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 55.

The spelling of 721524053376325 in words is "seven hundred twenty-one trillion, five hundred twenty-four billion, fifty-three million, three hundred seventy-six thousand, three hundred twenty-five".