25995574537 has 2 divisors, whose sum is σ = 25995574538. Its totient is φ = 25995574536.

The previous prime is 25995574529. The next prime is 25995574547. The reversal of 25995574537 is 73547559952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25723027456 + 272547081 = 160384^2 + 16509^2 .

It is a cyclic number.

It is not a de Polignac number, because 25995574537 - 2³ = 25995574529 is a prime.

It is not a weakly prime, because it can be changed into another prime (25995574547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12997787268 + 12997787269.

It is an arithmetic number, because the mean of its divisors is an integer number (12997787269).

Almost surely, 2^25995574537 is an apocalyptic number.

It is an amenable number.

25995574537 is a deficient number, since it is larger than the sum of its proper divisors (1).

25995574537 is an equidigital number, since it uses as much as digits as its factorization.

25995574537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59535000, while the sum is 61.

The spelling of 25995574537 in words is "twenty-five billion, nine hundred ninety-five million, five hundred seventy-four thousand, five hundred thirty-seven".