25450211212155 has 16 divisors (see below), whose sum is σ = 45244819932960. Its totient is φ = 13573445979744.

The previous prime is 25450211212057. The next prime is 25450211212157. The reversal of 25450211212155 is 55121211205452.

25450211212155 is a `hidden beast` number, since 2 + 5 + 4 + 502 + 1 + 121 + 21 + 5 + 5 = 666.

It is not a de Polignac number, because 25450211212155 - 2⁹ = 25450211211643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25450211212157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94260041392 + ... + 94260041661.

It is an arithmetic number, because the mean of its divisors is an integer number (2827801245810).

Almost surely, 2^{25450211212155} is an apocalyptic number.

25450211212155 is a deficient number, since it is larger than the sum of its proper divisors (19794608720805).

25450211212155 is a wasteful number, since it uses less digits than its factorization.

25450211212155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188520083067 (or 188520083061 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The spelling of 25450211212155 in words is "twenty-five trillion, four hundred fifty billion, two hundred eleven million, two hundred twelve thousand, one hundred fifty-five".