25298854749 has 48 divisors (see below), whose sum is σ = 44617530880. Its totient is φ = 13491165600.

The previous prime is 25298854709. The next prime is 25298854753. The reversal of 25298854749 is 94745889252.

25298854749 is a `hidden beast` number, since 2 + 5 + 2 + 9 + 88 + 547 + 4 + 9 = 666.

It is not a de Polignac number, because 25298854749 - 2¹² = 25298850653 is a prime.

It is a super-2 number, since 2×25298854749² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25298854709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77527 + ... + 237924.

Almost surely, 2^25298854749 is an apocalyptic number.

It is an amenable number.

25298854749 is a deficient number, since it is larger than the sum of its proper divisors (19318676131).

25298854749 is a wasteful number, since it uses less digits than its factorization.

25298854749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315550 (or 315547 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 25298854749 in words is "twenty-five billion, two hundred ninety-eight million, eight hundred fifty-four thousand, seven hundred forty-nine".