26640921942 has 48 divisors (see below), whose sum is σ = 60278549760. Its totient is φ = 8487593136.

The previous prime is 26640921941. The next prime is 26640921973. The reversal of 26640921942 is 24912904662.

26640921942 is a `hidden beast` number, since 26 + 6 + 409 + 219 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640921941) 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 23 ways as a sum of consecutive naturals, for example, 521673 + ... + 570459.

It is an arithmetic number, because the mean of its divisors is an integer number (1255803120).

Almost surely, 2^26640921942 is an apocalyptic number.

26640921942 is an abundant number, since it is smaller than the sum of its proper divisors (33637627818).

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

26640921942 is a wasteful number, since it uses less digits than its factorization.

26640921942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50137 (or 50134 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 26640921942 in words is "twenty-six billion, six hundred forty million, nine hundred twenty-one thousand, nine hundred forty-two".