1968934009172 has 24 divisors (see below), whose sum is σ = 3796978290336. Its totient is φ = 887605312608.

The previous prime is 1968934009067. The next prime is 1968934009181. The reversal of 1968934009172 is 2719004398691.

It is a super-2 number, since 2×1968934009172² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440278178 + ... + 440282649.

It is an arithmetic number, because the mean of its divisors is an integer number (158207428764).

Almost surely, 2^{1968934009172} is an apocalyptic number.

It is an amenable number.

1968934009172 is a deficient number, since it is larger than the sum of its proper divisors (1828044281164).

1968934009172 is a wasteful number, since it uses less digits than its factorization.

1968934009172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880560887 (or 880560885 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 59.

The spelling of 1968934009172 in words is "one trillion, nine hundred sixty-eight billion, nine hundred thirty-four million, nine thousand, one hundred seventy-two".