26401527515 has 32 divisors (see below), whose sum is σ = 34709086656. Its totient is φ = 19119605760.

The previous prime is 26401527511. The next prime is 26401527589. The reversal of 26401527515 is 51572510462.

It is not a de Polignac number, because 26401527515 - 2² = 26401527511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26401527511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18423239 + ... + 18424671.

It is an arithmetic number, because the mean of its divisors is an integer number (1084658958).

Almost surely, 2^26401527515 is an apocalyptic number.

26401527515 is a deficient number, since it is larger than the sum of its proper divisors (8307559141).

26401527515 is a wasteful number, since it uses less digits than its factorization.

26401527515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639.

The product of its (nonzero) digits is 84000, while the sum is 38.

The spelling of 26401527515 in words is "twenty-six billion, four hundred one million, five hundred twenty-seven thousand, five hundred fifteen".