25750501081 has 2 divisors, whose sum is σ = 25750501082. Its totient is φ = 25750501080.

The previous prime is 25750501033. The next prime is 25750501111. The reversal of 25750501081 is 18010505752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20753283600 + 4997217481 = 144060^2 + 70691^2 .

It is a cyclic number.

It is not a de Polignac number, because 25750501081 - 2¹⁹ = 25749976793 is a prime.

It is a super-2 number, since 2×25750501081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25750501181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12875250540 + 12875250541.

It is an arithmetic number, because the mean of its divisors is an integer number (12875250541).

Almost surely, 2^25750501081 is an apocalyptic number.

It is an amenable number.

25750501081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25750501081 is an equidigital number, since it uses as much as digits as its factorization.

25750501081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 34.

The spelling of 25750501081 in words is "twenty-five billion, seven hundred fifty million, five hundred one thousand, eighty-one".