25515400012455 has 8 divisors (see below), whose sum is σ = 40824640019952. Its totient is φ = 13608213339968.

The previous prime is 25515400012433. The next prime is 25515400012457. The reversal of 25515400012455 is 55421000451552.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25515400012455 - 2⁷ = 25515400012327 is a prime.

It is a super-2 number, since 2×25515400012455² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25515400012457) 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, 850513333734 + ... + 850513333763.

It is an arithmetic number, because the mean of its divisors is an integer number (5103080002494).

Almost surely, 2^{25515400012455} is an apocalyptic number.

25515400012455 is a deficient number, since it is larger than the sum of its proper divisors (15309240007497).

25515400012455 is a wasteful number, since it uses less digits than its factorization.

25515400012455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701026667505.

The product of its (nonzero) digits is 200000, while the sum is 39.

The spelling of 25515400012455 in words is "twenty-five trillion, five hundred fifteen billion, four hundred million, twelve thousand, four hundred fifty-five".