725631136501 has 2 divisors, whose sum is σ = 725631136502. Its totient is φ = 725631136500.

The previous prime is 725631136429. The next prime is 725631136547. The reversal of 725631136501 is 105631136527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624970883601 + 100660252900 = 790551^2 + 317270^2 .

It is a cyclic number.

It is not a de Polignac number, because 725631136501 - 2⁹ = 725631135989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725631136001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362815568250 + 362815568251.

It is an arithmetic number, because the mean of its divisors is an integer number (362815568251).

Almost surely, 2^725631136501 is an apocalyptic number.

It is an amenable number.

725631136501 is a deficient number, since it is larger than the sum of its proper divisors (1).

725631136501 is an equidigital number, since it uses as much as digits as its factorization.

725631136501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 725631136501 in words is "seven hundred twenty-five billion, six hundred thirty-one million, one hundred thirty-six thousand, five hundred one".