25498664361 has 24 divisors (see below), whose sum is σ = 39343098600. Its totient is φ = 15857565696.

The previous prime is 25498664357. The next prime is 25498664369. The reversal of 25498664361 is 16346689452.

25498664361 is a `hidden beast` number, since 2 + 549 + 8 + 6 + 64 + 36 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1479863961 + 24018800400 = 38469^2 + 154980^2 .

It is not a de Polignac number, because 25498664361 - 2² = 25498664357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25498664298 and 25498664307.

It is not an unprimeable number, because it can be changed into a prime (25498664369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720136 + ... + 754713.

It is an arithmetic number, because the mean of its divisors is an integer number (1639295775).

Almost surely, 2^25498664361 is an apocalyptic number.

It is an amenable number.

25498664361 is a deficient number, since it is larger than the sum of its proper divisors (13844434239).

25498664361 is a wasteful number, since it uses less digits than its factorization.

25498664361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474985 (or 1474982 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 25498664361 in words is "twenty-five billion, four hundred ninety-eight million, six hundred sixty-four thousand, three hundred sixty-one".