26506246648 has 16 divisors (see below), whose sum is σ = 56799100080. Its totient is φ = 11359819968.

The previous prime is 26506246639. The next prime is 26506246649. The reversal of 26506246648 is 84664260562.

It is a super-2 number, since 2×26506246648² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26506246649) 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, 236662861 + ... + 236662972.

It is an arithmetic number, because the mean of its divisors is an integer number (3549943755).

Almost surely, 2^26506246648 is an apocalyptic number.

26506246648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26506246648 is an abundant number, since it is smaller than the sum of its proper divisors (30292853432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26506246648 is a wasteful number, since it uses less digits than its factorization.

26506246648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473325846 (or 473325842 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 49.

The spelling of 26506246648 in words is "twenty-six billion, five hundred six million, two hundred forty-six thousand, six hundred forty-eight".