25783640910 has 48 divisors (see below), whose sum is σ = 67186875600. Its totient is φ = 6860313600.

The previous prime is 25783640891. The next prime is 25783640947. The reversal of 25783640910 is 1904638752.

25783640910 is a `hidden beast` number, since 2 + 578 + 3 + 64 + 0 + 9 + 10 = 666.

It is a super-2 number, since 2×25783640910² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278616 + ... + 359435.

It is an arithmetic number, because the mean of its divisors is an integer number (1399726575).

It is a 1-persistent number, because it is pandigital, but 2⋅25783640910 = 51567281820 is not.

Almost surely, 2^25783640910 is an apocalyptic number.

25783640910 is an abundant number, since it is smaller than the sum of its proper divisors (41403234690).

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

25783640910 is a wasteful number, since it uses less digits than its factorization.

25783640910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638513 (or 638510 counting only the distinct ones).

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

The spelling of 25783640910 in words is "twenty-five billion, seven hundred eighty-three million, six hundred forty thousand, nine hundred ten".