26347997380 has 12 divisors (see below), whose sum is σ = 55330794540. Its totient is φ = 10539198944.

The previous prime is 26347997359. The next prime is 26347997437. The reversal of 26347997380 is 8379974362.

It can be written as a sum of positive squares in 2 ways, for example, as 6642576004 + 19705421376 = 81502^2 + 140376^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658699915 + ... + 658699954.

It is an arithmetic number, because the mean of its divisors is an integer number (4610899545).

Almost surely, 2^26347997380 is an apocalyptic number.

26347997380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26347997380 is an abundant number, since it is smaller than the sum of its proper divisors (28982797160).

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

26347997380 is a wasteful number, since it uses less digits than its factorization.

26347997380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317399878 (or 1317399876 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 58.

The spelling of 26347997380 in words is "twenty-six billion, three hundred forty-seven million, nine hundred ninety-seven thousand, three hundred eighty".