25546187797980 has 24 divisors (see below), whose sum is σ = 71529325834512. Its totient is φ = 6812316746112.

The previous prime is 25546187797939. The next prime is 25546187798017. The reversal of 25546187797980 is 8979778164552.

It is a super-2 number, since 2×25546187797980² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25546187797896 and 25546187797905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212884898257 + ... + 212884898376.

It is an arithmetic number, because the mean of its divisors is an integer number (2980388576438).

Almost surely, 2^{25546187797980} is an apocalyptic number.

25546187797980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25546187797980 is an abundant number, since it is smaller than the sum of its proper divisors (45983138036532).

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

25546187797980 is a wasteful number, since it uses less digits than its factorization.

25546187797980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425769796645 (or 425769796643 counting only the distinct ones).

The product of its (nonzero) digits is 2133734400, while the sum is 78.

The spelling of 25546187797980 in words is "twenty-five trillion, five hundred forty-six billion, one hundred eighty-seven million, seven hundred ninety-seven thousand, nine hundred eighty".