25240155550 has 48 divisors (see below), whose sum is σ = 48999332592. Its totient is φ = 9663929600.

The previous prime is 25240155511. The next prime is 25240155553. The reversal of 25240155550 is 5555104252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25240155553) 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 in 23 ways as a sum of consecutive naturals, for example, 7504 + ... + 224803.

It is an arithmetic number, because the mean of its divisors is an integer number (1020819429).

Almost surely, 2^25240155550 is an apocalyptic number.

25240155550 is a deficient number, since it is larger than the sum of its proper divisors (23759177042).

25240155550 is a wasteful number, since it uses less digits than its factorization.

25240155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232413 (or 232408 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 34.

The spelling of 25240155550 in words is "twenty-five billion, two hundred forty million, one hundred fifty-five thousand, five hundred fifty".