25166037473640 has 768 divisors, whose sum is σ = 99507792384000. Its totient is φ = 5394357043200.

The previous prime is 25166037473623. The next prime is 25166037473677. The reversal of 25166037473640 is 4637473066152.

25166037473640 is a `hidden beast` number, since 2 + 5 + 166 + 0 + 3 + 7 + 473 + 6 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 477208714 + ... + 477261446.

It is an arithmetic number, because the mean of its divisors is an integer number (129567438000).

Almost surely, 2^{25166037473640} is an apocalyptic number.

25166037473640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25166037473640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49753896192000).

25166037473640 is an abundant number, since it is smaller than the sum of its proper divisors (74341754910360).

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

25166037473640 is a wasteful number, since it uses less digits than its factorization.

25166037473640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52978 (or 52971 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 54.

The spelling of 25166037473640 in words is "twenty-five trillion, one hundred sixty-six billion, thirty-seven million, four hundred seventy-three thousand, six hundred forty".