1949867857926 has 24 divisors (see below), whose sum is σ = 4224976675920. Its totient is φ = 649915493616.

The previous prime is 1949867857921. The next prime is 1949867857939. The reversal of 1949867857926 is 6297587689491.

1949867857926 is a `hidden beast` number, since 1 + 9 + 498 + 6 + 78 + 57 + 9 + 2 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949867857921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3073681 + ... + 3653388.

It is an arithmetic number, because the mean of its divisors is an integer number (176040694830).

Almost surely, 2^{1949867857926} is an apocalyptic number.

1949867857926 is an abundant number, since it is smaller than the sum of its proper divisors (2275108817994).

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

1949867857926 is a wasteful number, since it uses less digits than its factorization.

1949867857926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743180 (or 6743177 counting only the distinct ones).

The product of its digits is 3292047360, while the sum is 81.

The spelling of 1949867857926 in words is "one trillion, nine hundred forty-nine billion, eight hundred sixty-seven million, eight hundred fifty-seven thousand, nine hundred twenty-six".