25126374997 has 2 divisors, whose sum is σ = 25126374998. Its totient is φ = 25126374996.

The previous prime is 25126374983. The next prime is 25126375031. The reversal of 25126374997 is 79947362152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18203136561 + 6923238436 = 134919^2 + 83206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25126374997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25126374937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12563187498 + 12563187499.

It is an arithmetic number, because the mean of its divisors is an integer number (12563187499).

Almost surely, 2^25126374997 is an apocalyptic number.

It is an amenable number.

25126374997 is a deficient number, since it is larger than the sum of its proper divisors (1).

25126374997 is an equidigital number, since it uses as much as digits as its factorization.

25126374997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 55.

The spelling of 25126374997 in words is "twenty-five billion, one hundred twenty-six million, three hundred seventy-four thousand, nine hundred ninety-seven".