25722706157 has 8 divisors (see below), whose sum is σ = 26397419832. Its totient is φ = 25050246400.

The previous prime is 25722706147. The next prime is 25722706181. The reversal of 25722706157 is 75160722752.

It can be written as a sum of positive squares in 4 ways, for example, as 1155592036 + 24567114121 = 33994^2 + 156739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25722706157 - 2²⁰ = 25721657581 is a prime.

It is a super-2 number, since 2×25722706157² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25722706117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540344 + ... + 586017.

It is an arithmetic number, because the mean of its divisors is an integer number (3299677479).

Almost surely, 2^25722706157 is an apocalyptic number.

It is an amenable number.

25722706157 is a deficient number, since it is larger than the sum of its proper divisors (674713675).

25722706157 is a wasteful number, since it uses less digits than its factorization.

25722706157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126959.

The product of its (nonzero) digits is 411600, while the sum is 44.

The spelling of 25722706157 in words is "twenty-five billion, seven hundred twenty-two million, seven hundred six thousand, one hundred fifty-seven".