25387748455 has 8 divisors (see below), whose sum is σ = 30469973904. Its totient is φ = 20307081600.

The previous prime is 25387748411. The next prime is 25387748497. The reversal of 25387748455 is 55484778352.

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

It is not a de Polignac number, because 25387748455 - 2¹⁵ = 25387715687 is a prime.

It is a super-2 number, since 2×25387748455² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25387748455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353506 + ... + 419215.

It is an arithmetic number, because the mean of its divisors is an integer number (3808746738).

Almost surely, 2^25387748455 is an apocalyptic number.

25387748455 is a deficient number, since it is larger than the sum of its proper divisors (5082225449).

25387748455 is an equidigital number, since it uses as much as digits as its factorization.

25387748455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779297.

The product of its digits is 37632000, while the sum is 58.

The spelling of 25387748455 in words is "twenty-five billion, three hundred eighty-seven million, seven hundred forty-eight thousand, four hundred fifty-five".