25791643580040 has 160 divisors (see below), whose sum is σ = 93356932256280. Its totient is φ = 6348712255488.

The previous prime is 25791643580039. The next prime is 25791643580071. The reversal of 25791643580040 is 4008534619752.

It is a happy number.

25791643580040 is a `hidden beast` number, since 2 + 5 + 7 + 9 + 16 + 4 + 3 + 580 + 0 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20049456986244 + 5742186593796 = 4477662^2 + 2396286^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 306126489 + ... + 306210728.

It is a 1-persistent number, because it is pandigital, but 2⋅25791643580040 = 51583287160080 is not.

Almost surely, 2^{25791643580040} is an apocalyptic number.

25791643580040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25791643580040 is an abundant number, since it is smaller than the sum of its proper divisors (67565288676240).

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

25791643580040 is a wasteful number, since it uses less digits than its factorization.

25791643580040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612337253 (or 612337240 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 25791643580040 in words is "twenty-five trillion, seven hundred ninety-one billion, six hundred forty-three million, five hundred eighty thousand, forty".