26260624400661 has 32 divisors (see below), whose sum is σ = 44463476153600. Its totient is φ = 15005718970560.

The previous prime is 26260624400641. The next prime is 26260624400671. The reversal of 26260624400661 is 16600442606262.

It is not a de Polignac number, because 26260624400661 - 2⁶ = 26260624400597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26260624400641) 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, 6554151 + ... + 9771291.

It is an arithmetic number, because the mean of its divisors is an integer number (1389483629800).

Almost surely, 2^{26260624400661} is an apocalyptic number.

26260624400661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26260624400661 is a deficient number, since it is larger than the sum of its proper divisors (18202851752939).

26260624400661 is a wasteful number, since it uses less digits than its factorization.

26260624400661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260346 (or 3260340 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 26260624400661 in words is "twenty-six trillion, two hundred sixty billion, six hundred twenty-four million, four hundred thousand, six hundred sixty-one".