8161538942 has 8 divisors (see below), whose sum is σ = 12962444256. Its totient is φ = 3840724192.

The previous prime is 8161538927. The next prime is 8161538999. The reversal of 8161538942 is 2498351618.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8161538942² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120022598 + ... + 120022665.

It is an arithmetic number, because the mean of its divisors is an integer number (1620305532).

Almost surely, 2^8161538942 is an apocalyptic number.

8161538942 is a deficient number, since it is larger than the sum of its proper divisors (4800905314).

8161538942 is a wasteful number, since it uses less digits than its factorization.

8161538942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240045282.

The product of its digits is 414720, while the sum is 47.

The square root of 8161538942 is about 90341.2361106488. The cubic root of 8161538942 is about 2013.3719743971.

The spelling of 8161538942 in words is "eight billion, one hundred sixty-one million, five hundred thirty-eight thousand, nine hundred forty-two".