26537890164 has 12 divisors (see below), whose sum is σ = 61921743744.
Its totient is φ = 8845963384.
The previous prime is 26537890129. The next prime is 26537890189. The reversal of 26537890164 is 46109873562.
It is a tau number, because it is divible by the number of its divisors (12).
It is a super-2 number, since 2×265378901642 (a number of 22 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 3 ways as a sum of consecutive naturals, for example, 1105745412 + ... + 1105745435.
It is an arithmetic number, because the mean of its divisors is an integer number (5160145312).
It is a 1-persistent number, because it is pandigital, but 2⋅26537890164 = 53075780328 is not.
Almost surely, 226537890164 is an apocalyptic number.
It is an amenable number.
26537890164 is an abundant number, since it is smaller than the sum of its proper divisors (35383853580).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
26537890164 is a wasteful number, since it uses less digits than its factorization.
26537890164 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2211490854 (or 2211490852 counting only the distinct ones).
The product of its (nonzero) digits is 2177280, while the sum is 51.
The spelling of 26537890164 in words is "twenty-six billion, five hundred thirty-seven million, eight hundred ninety thousand, one hundred sixty-four".