25540402154 has 32 divisors (see below), whose sum is σ = 39293403264. Its totient is φ = 12447285760.

The previous prime is 25540402133. The next prime is 25540402157. The reversal of 25540402154 is 45120404552.

It is a self number, because there is not a number n which added to its sum of digits gives 25540402154.

It is not an unprimeable number, because it can be changed into a prime (25540402157) 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, 7106582 + ... + 7110174.

It is an arithmetic number, because the mean of its divisors is an integer number (1227918852).

Almost surely, 2^25540402154 is an apocalyptic number.

25540402154 is a deficient number, since it is larger than the sum of its proper divisors (13753001110).

25540402154 is a wasteful number, since it uses less digits than its factorization.

25540402154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4222.

The product of its (nonzero) digits is 32000, while the sum is 32.

The spelling of 25540402154 in words is "twenty-five billion, five hundred forty million, four hundred two thousand, one hundred fifty-four".