25240790505 has 32 divisors (see below), whose sum is σ = 46240005888. Its totient is φ = 11517292800.

The previous prime is 25240790501. The next prime is 25240790507. The reversal of 25240790505 is 50509704252.

It is not a de Polignac number, because 25240790505 - 2² = 25240790501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25240790501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165366 + ... + 278975.

It is an arithmetic number, because the mean of its divisors is an integer number (1445000184).

Almost surely, 2^25240790505 is an apocalyptic number.

It is an amenable number.

25240790505 is a deficient number, since it is larger than the sum of its proper divisors (20999215383).

25240790505 is a wasteful number, since it uses less digits than its factorization.

25240790505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444897.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 25240790505 in words is "twenty-five billion, two hundred forty million, seven hundred ninety thousand, five hundred five".