25123565040 has 80 divisors (see below), whose sum is σ = 89009207808. Its totient is φ = 5742528768.

The previous prime is 25123565023. The next prime is 25123565057. The reversal of 25123565040 is 4056532152.

It is an interprime number because it is at equal distance from previous prime (25123565023) and next prime (25123565057).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×25123565040² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25123564992 and 25123565010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7475572 + ... + 7478931.

Almost surely, 2^25123565040 is an apocalyptic number.

25123565040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25123565040 is an abundant number, since it is smaller than the sum of its proper divisors (63885642768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25123565040 is a wasteful number, since it uses less digits than its factorization.

25123565040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14954526 (or 14954520 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 25123565040 in words is "twenty-five billion, one hundred twenty-three million, five hundred sixty-five thousand, forty".