25317556442 has 32 divisors (see below), whose sum is σ = 41293048320. Its totient is φ = 11597564160.

The previous prime is 25317556427. The next prime is 25317556499. The reversal of 25317556442 is 24465571352.

It is a junction number, because it is equal to n+sod(n) for n = 25317556393 and 25317556402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124328 + ... + 257084.

It is an arithmetic number, because the mean of its divisors is an integer number (1290407760).

Almost surely, 2^25317556442 is an apocalyptic number.

25317556442 is a deficient number, since it is larger than the sum of its proper divisors (15975491878).

25317556442 is a wasteful number, since it uses less digits than its factorization.

25317556442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132926.

The product of its digits is 1008000, while the sum is 44.

The spelling of 25317556442 in words is "twenty-five billion, three hundred seventeen million, five hundred fifty-six thousand, four hundred forty-two".