25555002554 has 4 divisors (see below), whose sum is σ = 38332503834. Its totient is φ = 12777501276.

The previous prime is 25555002553. The next prime is 25555002593. The reversal of 25555002554 is 45520055552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22510501225 + 3044501329 = 150035^2 + 55177^2 .

It is not an unprimeable number, because it can be changed into a prime (25555002553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6388750637 + ... + 6388750640.

Almost surely, 2^25555002554 is an apocalyptic number.

25555002554 is a deficient number, since it is larger than the sum of its proper divisors (12777501280).

25555002554 is a wasteful number, since it uses less digits than its factorization.

25555002554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12777501279.

The product of its (nonzero) digits is 250000, while the sum is 38.

The spelling of 25555002554 in words is "twenty-five billion, five hundred fifty-five million, two thousand, five hundred fifty-four".