158961967138 has 32 divisors (see below), whose sum is σ = 257908033152. Its totient is φ = 73046438400.

The previous prime is 158961967103. The next prime is 158961967181. The reversal of 158961967138 is 831769169851.

It is a super-2 number, since 2×158961967138² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 158961967138.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14224293 + ... + 14235463.

It is an arithmetic number, because the mean of its divisors is an integer number (8059626036).

Almost surely, 2^158961967138 is an apocalyptic number.

158961967138 is a deficient number, since it is larger than the sum of its proper divisors (98946066014).

158961967138 is a wasteful number, since it uses less digits than its factorization.

158961967138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13530.

The product of its digits is 19595520, while the sum is 64.

The spelling of 158961967138 in words is "one hundred fifty-eight billion, nine hundred sixty-one million, nine hundred sixty-seven thousand, one hundred thirty-eight".