25016749641 has 128 divisors (see below), whose sum is σ = 42866503680. Its totient is φ = 14480389440.

The previous prime is 25016749633. The next prime is 25016749649. The reversal of 25016749641 is 14694761052.

25016749641 is a `hidden beast` number, since 2 + 501 + 67 + 49 + 6 + 41 = 666.

It is an interprime number because it is at equal distance from previous prime (25016749633) and next prime (25016749649).

It is not a de Polignac number, because 25016749641 - 2³ = 25016749633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25016749649) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 43811886 + ... + 43812456.

It is an arithmetic number, because the mean of its divisors is an integer number (334894560).

Almost surely, 2^25016749641 is an apocalyptic number.

It is an amenable number.

25016749641 is a deficient number, since it is larger than the sum of its proper divisors (17849754039).

25016749641 is an equidigital number, since it uses as much as digits as its factorization.

25016749641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 25016749641 in words is "twenty-five billion, sixteen million, seven hundred forty-nine thousand, six hundred forty-one".