25119156921 has 16 divisors (see below), whose sum is σ = 35046419904. Its totient is φ = 15986078784.

The previous prime is 25119156919. The next prime is 25119156941. The reversal of 25119156921 is 12965191152.

It is not a de Polignac number, because 25119156921 - 2¹ = 25119156919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25119156941) 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, 2129011 + ... + 2140776.

It is an arithmetic number, because the mean of its divisors is an integer number (2190401244).

Almost surely, 2^25119156921 is an apocalyptic number.

It is an amenable number.

25119156921 is a deficient number, since it is larger than the sum of its proper divisors (9927262983).

25119156921 is a wasteful number, since it uses less digits than its factorization.

25119156921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269880.

The product of its digits is 48600, while the sum is 42.

The spelling of 25119156921 in words is "twenty-five billion, one hundred nineteen million, one hundred fifty-six thousand, nine hundred twenty-one".