25797545442 has 32 divisors (see below), whose sum is σ = 57895493760. Its totient is φ = 8514039600.

The previous prime is 25797545419. The next prime is 25797545467. The reversal of 25797545442 is 24454579752.

It is a happy number.

25797545442 is a `hidden beast` number, since 2 + 5 + 7 + 97 + 5 + 4 + 544 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 2359558 + ... + 2370465.

It is an arithmetic number, because the mean of its divisors is an integer number (1809234180).

Almost surely, 2^25797545442 is an apocalyptic number.

25797545442 is an abundant number, since it is smaller than the sum of its proper divisors (32097948318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25797545442 is a wasteful number, since it uses less digits than its factorization.

25797545442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730135 (or 4730129 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 54.

The spelling of 25797545442 in words is "twenty-five billion, seven hundred ninety-seven million, five hundred forty-five thousand, four hundred forty-two".