26539107640 has 32 divisors (see below), whose sum is σ = 60839657280. Its totient is φ = 10415347072.

The previous prime is 26539107631. The next prime is 26539107653. The reversal of 26539107640 is 4670193562.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6257104 + ... + 6261343.

It is an arithmetic number, because the mean of its divisors is an integer number (1901239290).

Almost surely, 2^26539107640 is an apocalyptic number.

26539107640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26539107640 is an abundant number, since it is smaller than the sum of its proper divisors (34300549640).

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

26539107640 is a wasteful number, since it uses less digits than its factorization.

26539107640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12518511 (or 12518507 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 26539107640 in words is "twenty-six billion, five hundred thirty-nine million, one hundred seven thousand, six hundred forty".