25578127059870 has 256 divisors, whose sum is σ = 77650801901568. Its totient is φ = 5237580579840.

The previous prime is 25578127059853. The next prime is 25578127059887. The reversal of 25578127059870 is 7895072187552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25578127059853) and next prime (25578127059887).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 196051479 + ... + 196181901.

It is an arithmetic number, because the mean of its divisors is an integer number (303323444928).

Almost surely, 2^{25578127059870} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25578127059870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38825400950784).

25578127059870 is an abundant number, since it is smaller than the sum of its proper divisors (52072674841698).

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

25578127059870 is a wasteful number, since it uses less digits than its factorization.

25578127059870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131687.

The product of its (nonzero) digits is 98784000, while the sum is 66.

The spelling of 25578127059870 in words is "twenty-five trillion, five hundred seventy-eight billion, one hundred twenty-seven million, fifty-nine thousand, eight hundred seventy".