26091797781854 has 64 divisors (see below), whose sum is σ = 45009149982720. Its totient is φ = 11112360917760.

The previous prime is 26091797781823. The next prime is 26091797781869. The reversal of 26091797781854 is 45818779719062.

It is a super-2 number, since 2×26091797781854² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4695300044 + ... + 4695305600.

It is an arithmetic number, because the mean of its divisors is an integer number (703267968480).

Almost surely, 2^{26091797781854} is an apocalyptic number.

26091797781854 is a deficient number, since it is larger than the sum of its proper divisors (18917352200866).

26091797781854 is a wasteful number, since it uses less digits than its factorization.

26091797781854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8953.

The product of its (nonzero) digits is 426746880, while the sum is 74.

The spelling of 26091797781854 in words is "twenty-six trillion, ninety-one billion, seven hundred ninety-seven million, seven hundred eighty-one thousand, eight hundred fifty-four".