25540370485739 has 2 divisors, whose sum is σ = 25540370485740. Its totient is φ = 25540370485738.

The previous prime is 25540370485711. The next prime is 25540370485901. The reversal of 25540370485739 is 93758407304552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25540370485739 - 2²⁴ = 25540353708523 is a prime.

It is a super-2 number, since 2×25540370485739² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25540370485039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770185242869 + 12770185242870.

It is an arithmetic number, because the mean of its divisors is an integer number (12770185242870).

Almost surely, 2^{25540370485739} is an apocalyptic number.

25540370485739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25540370485739 is an equidigital number, since it uses as much as digits as its factorization.

25540370485739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008000, while the sum is 62.

The spelling of 25540370485739 in words is "twenty-five trillion, five hundred forty billion, three hundred seventy million, four hundred eighty-five thousand, seven hundred thirty-nine".