25900025949 has 48 divisors (see below), whose sum is σ = 42983740800. Its totient is φ = 14721257088.

The previous prime is 25900025933. The next prime is 25900025951. The reversal of 25900025949 is 94952000952.

25900025949 is a `hidden beast` number, since 2 + 59 + 0 + 0 + 0 + 2 + 594 + 9 = 666.

It is not a de Polignac number, because 25900025949 - 2⁴ = 25900025933 is a prime.

It is a super-2 number, since 2×25900025949² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25900025999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13086442 + ... + 13088420.

It is an arithmetic number, because the mean of its divisors is an integer number (895494600).

Almost surely, 2^25900025949 is an apocalyptic number.

It is an amenable number.

25900025949 is a deficient number, since it is larger than the sum of its proper divisors (17083714851).

25900025949 is a wasteful number, since it uses less digits than its factorization.

25900025949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 25900025949 in words is "twenty-five billion, nine hundred million, twenty-five thousand, nine hundred forty-nine".