25305796761 has 32 divisors (see below), whose sum is σ = 39665783808. Its totient is φ = 14047473600.

The previous prime is 25305796723. The next prime is 25305796771. The reversal of 25305796761 is 16769750352.

It is not a de Polignac number, because 25305796761 - 2⁶ = 25305796697 is a prime.

It is a super-2 number, since 2×25305796761² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25305796721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474286 + ... + 524936.

It is an arithmetic number, because the mean of its divisors is an integer number (1239555744).

Almost surely, 2^25305796761 is an apocalyptic number.

25305796761 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25305796761 is a deficient number, since it is larger than the sum of its proper divisors (14359987047).

25305796761 is a wasteful number, since it uses less digits than its factorization.

25305796761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51341.

The product of its (nonzero) digits is 2381400, while the sum is 51.

The spelling of 25305796761 in words is "twenty-five billion, three hundred five million, seven hundred ninety-six thousand, seven hundred sixty-one".