109157439971986 has 16 divisors (see below), whose sum is σ = 187129855869120. Its totient is φ = 46781056008720.

The previous prime is 109157439971939. The next prime is 109157439972041. The reversal of 109157439971986 is 689179934751901.

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, 57700821 + ... + 59562568.

It is an arithmetic number, because the mean of its divisors is an integer number (11695615991820).

Almost surely, 2^{109157439971986} is an apocalyptic number.

109157439971986 is a deficient number, since it is larger than the sum of its proper divisors (77972415897134).

109157439971986 is a wasteful number, since it uses less digits than its factorization.

109157439971986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117329889.

The product of its (nonzero) digits is 925888320, while the sum is 79.

The spelling of 109157439971986 in words is "one hundred nine trillion, one hundred fifty-seven billion, four hundred thirty-nine million, nine hundred seventy-one thousand, nine hundred eighty-six".