25491752143551 has 12 divisors (see below), whose sum is σ = 36872068217712. Its totient is φ = 16971125219136.

The previous prime is 25491752143549. The next prime is 25491752143553. The reversal of 25491752143551 is 15534125719452.

25491752143551 is a `hidden beast` number, since 2 + 5 + 4 + 9 + 1 + 75 + 2 + 14 + 3 + 551 = 666.

It is an interprime number because it is at equal distance from previous prime (25491752143549) and next prime (25491752143553).

It is not a de Polignac number, because 25491752143551 - 2¹ = 25491752143549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25491752143553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1948010586 + ... + 1948023671.

It is an arithmetic number, because the mean of its divisors is an integer number (3072672351476).

Almost surely, 2^{25491752143551} is an apocalyptic number.

25491752143551 is a deficient number, since it is larger than the sum of its proper divisors (11380316074161).

25491752143551 is a wasteful number, since it uses less digits than its factorization.

25491752143551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896034990 (or 3896034987 counting only the distinct ones).

The product of its digits is 7560000, while the sum is 54.

The spelling of 25491752143551 in words is "twenty-five trillion, four hundred ninety-one billion, seven hundred fifty-two million, one hundred forty-three thousand, five hundred fifty-one".