25001540145155 has 32 divisors (see below), whose sum is σ = 35974113128448. Its totient is φ = 16318902038400.

The previous prime is 25001540145143. The next prime is 25001540145187. The reversal of 25001540145155 is 55154104510052.

It is not a de Polignac number, because 25001540145155 - 2³² = 24997245177859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188809997 + ... + 188942366.

It is an arithmetic number, because the mean of its divisors is an integer number (1124191035264).

Almost surely, 2^{25001540145155} is an apocalyptic number.

25001540145155 is a deficient number, since it is larger than the sum of its proper divisors (10972572983293).

25001540145155 is a wasteful number, since it uses less digits than its factorization.

25001540145155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377752467.

The product of its (nonzero) digits is 100000, while the sum is 38.

The spelling of 25001540145155 in words is "twenty-five trillion, one billion, five hundred forty million, one hundred forty-five thousand, one hundred fifty-five".