25537366087 has 4 divisors (see below), whose sum is σ = 25669684240. Its totient is φ = 25405047936.

The previous prime is 25537366009. The next prime is 25537366091. The reversal of 25537366087 is 78066373552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25537366087 - 2²⁷ = 25403148359 is a prime.

It is a super-2 number, since 2×25537366087² (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 (25537366787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66158787 + ... + 66159172.

It is an arithmetic number, because the mean of its divisors is an integer number (6417421060).

Almost surely, 2^25537366087 is an apocalyptic number.

25537366087 is a deficient number, since it is larger than the sum of its proper divisors (132318153).

25537366087 is a wasteful number, since it uses less digits than its factorization.

25537366087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132318152.

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 25537366087 in words is "twenty-five billion, five hundred thirty-seven million, three hundred sixty-six thousand, eighty-seven".