26401402504 has 16 divisors (see below), whose sum is σ = 50180749020. Its totient is φ = 13019869440.

The previous prime is 26401402501. The next prime is 26401402507. The reversal of 26401402504 is 40520410462.

It is an interprime number because it is at equal distance from previous prime (26401402501) and next prime (26401402507).

It can be written as a sum of positive squares in 2 ways, for example, as 25776302500 + 625100004 = 160550^2 + 25002^2 .

It is not an unprimeable number, because it can be changed into a prime (26401402501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22603357 + ... + 22604524.

Almost surely, 2^26401402504 is an apocalyptic number.

It is an amenable number.

26401402504 is a deficient number, since it is larger than the sum of its proper divisors (23779346516).

26401402504 is a wasteful number, since it uses less digits than its factorization.

26401402504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45207960 (or 45207956 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 26401402504 its reverse (40520410462), we get a palindrome (66921812966).

The spelling of 26401402504 in words is "twenty-six billion, four hundred one million, four hundred two thousand, five hundred four".