105907438978 has 16 divisors (see below), whose sum is σ = 173452137696. Its totient is φ = 48098340640.

The previous prime is 105907438963. The next prime is 105907438981. The reversal of 105907438978 is 879834709501.

It is a super-2 number, since 2×105907438978² (a number of 23 digits) contains 22 as substring.

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, 2044051 + ... + 2095222.

It is an arithmetic number, because the mean of its divisors is an integer number (10840758606).

Almost surely, 2^105907438978 is an apocalyptic number.

105907438978 is a deficient number, since it is larger than the sum of its proper divisors (67544698718).

105907438978 is a wasteful number, since it uses less digits than its factorization.

105907438978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140449.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 105907438978 in words is "one hundred five billion, nine hundred seven million, four hundred thirty-eight thousand, nine hundred seventy-eight".