105430172872 has 16 divisors (see below), whose sum is σ = 198544815900. Its totient is φ = 52484888640.

The previous prime is 105430172867. The next prime is 105430172879. The reversal of 105430172872 is 278271034501.

It can be written as a sum of positive squares in 2 ways, for example, as 81845199396 + 23584973476 = 286086^2 + 153574^2 .

It is a super-2 number, since 2×105430172872² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105430172879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28772779 + ... + 28776442.

Almost surely, 2^105430172872 is an apocalyptic number.

It is an amenable number.

105430172872 is a deficient number, since it is larger than the sum of its proper divisors (93114643028).

105430172872 is a wasteful number, since it uses less digits than its factorization.

105430172872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57549456 (or 57549452 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 105430172872 in words is "one hundred five billion, four hundred thirty million, one hundred seventy-two thousand, eight hundred seventy-two".