25155621352 has 8 divisors (see below), whose sum is σ = 47166790050. Its totient is φ = 12577810672.

The previous prime is 25155621329. The next prime is 25155621419. The reversal of 25155621352 is 25312655152.

It can be written as a sum of positive squares in only one way, i.e., 22390333956 + 2765287396 = 149634^2 + 52586^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1572226327 + ... + 1572226342.

Almost surely, 2^25155621352 is an apocalyptic number.

It is an amenable number.

25155621352 is a deficient number, since it is larger than the sum of its proper divisors (22011168698).

25155621352 is a wasteful number, since it uses less digits than its factorization.

25155621352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144452675 (or 3144452671 counting only the distinct ones).

The product of its digits is 90000, while the sum is 37.

The spelling of 25155621352 in words is "twenty-five billion, one hundred fifty-five million, six hundred twenty-one thousand, three hundred fifty-two".