25854954197731 has 2 divisors, whose sum is σ = 25854954197732. Its totient is φ = 25854954197730.

The previous prime is 25854954197711. The next prime is 25854954197767. The reversal of 25854954197731 is 13779145945852.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25854954197731 is a prime.

It is a super-2 number, since 2×25854954197731² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25854954197711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12927477098865 + 12927477098866.

It is an arithmetic number, because the mean of its divisors is an integer number (12927477098866).

Almost surely, 2^{25854954197731} is an apocalyptic number.

25854954197731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25854954197731 is an equidigital number, since it uses as much as digits as its factorization.

25854954197731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024000, while the sum is 70.

The spelling of 25854954197731 in words is "twenty-five trillion, eight hundred fifty-four billion, nine hundred fifty-four million, one hundred ninety-seven thousand, seven hundred thirty-one".