25402540216 has 8 divisors (see below), whose sum is σ = 47629762920. Its totient is φ = 12701270104.

The previous prime is 25402540157. The next prime is 25402540223. The reversal of 25402540216 is 61204520452.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1587658756 + ... + 1587658771.

It is an arithmetic number, because the mean of its divisors is an integer number (5953720365).

Almost surely, 2^25402540216 is an apocalyptic number.

It is an amenable number.

25402540216 is a deficient number, since it is larger than the sum of its proper divisors (22227222704).

25402540216 is a wasteful number, since it uses less digits than its factorization.

25402540216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175317533 (or 3175317529 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 25402540216 in words is "twenty-five billion, four hundred two million, five hundred forty thousand, two hundred sixteen".