25540510531980 has 96 divisors (see below), whose sum is σ = 75278503641600. Its totient is φ = 6452235836928.

The previous prime is 25540510531931. The next prime is 25540510531981. The reversal of 25540510531980 is 8913501504552.

It is a super-7 number, since 7×25540510531980⁷ (a number of 95 digits) contains 7777777 as substring.

It is not an unprimeable number, because it can be changed into a prime (25540510531981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91104504 + ... + 91384416.

It is an arithmetic number, because the mean of its divisors is an integer number (784151079600).

Almost surely, 2^{25540510531980} is an apocalyptic number.

25540510531980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25540510531980 is an abundant number, since it is smaller than the sum of its proper divisors (49737993109620).

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

25540510531980 is a wasteful number, since it uses less digits than its factorization.

25540510531980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359983 (or 359981 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 48.

The spelling of 25540510531980 in words is "twenty-five trillion, five hundred forty billion, five hundred ten million, five hundred thirty-one thousand, nine hundred eighty".