26020178556 has 24 divisors (see below), whose sum is σ = 60723683664. Its totient is φ = 8671973760.

The previous prime is 26020178551. The next prime is 26020178629. The reversal of 26020178556 is 65587102062.

It is a super-2 number, since 2×26020178556² (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 (26020178551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99625 + ... + 248928.

It is an arithmetic number, because the mean of its divisors is an integer number (2530153486).

Almost surely, 2^26020178556 is an apocalyptic number.

It is an amenable number.

26020178556 is an abundant number, since it is smaller than the sum of its proper divisors (34703505108).

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

26020178556 is a wasteful number, since it uses less digits than its factorization.

26020178556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354781 (or 354779 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 26020178556 in words is "twenty-six billion, twenty million, one hundred seventy-eight thousand, five hundred fifty-six".