25207787852381 has 8 divisors (see below), whose sum is σ = 26021211360000. Its totient is φ = 24394381161120.

The previous prime is 25207787852371. The next prime is 25207787852383. The reversal of 25207787852381 is 18325878770252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25207787852381 is a prime.

It is a super-2 number, since 2×25207787852381² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25207787852383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121831 + ... + 7188468.

It is an arithmetic number, because the mean of its divisors is an integer number (3252651420000).

Almost surely, 2^{25207787852381} is an apocalyptic number.

It is an amenable number.

25207787852381 is a deficient number, since it is larger than the sum of its proper divisors (813423507619).

25207787852381 is an equidigital number, since it uses as much as digits as its factorization.

25207787852381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408179.

The product of its (nonzero) digits is 105369600, while the sum is 65.

The spelling of 25207787852381 in words is "twenty-five trillion, two hundred seven billion, seven hundred eighty-seven million, eight hundred fifty-two thousand, three hundred eighty-one".