16115566634 has 4 divisors (see below), whose sum is σ = 24173349954. Its totient is φ = 8057783316.

The previous prime is 16115566609. The next prime is 16115566673. The reversal of 16115566634 is 43666551161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14243706409 + 1871860225 = 119347^2 + 43265^2 .

It is a super-2 number, since 2×16115566634² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4028891657 + ... + 4028891660.

Almost surely, 2^16115566634 is an apocalyptic number.

16115566634 is a deficient number, since it is larger than the sum of its proper divisors (8057783320).

16115566634 is an equidigital number, since it uses as much as digits as its factorization.

16115566634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8057783319.

The product of its digits is 388800, while the sum is 44.

The spelling of 16115566634 in words is "sixteen billion, one hundred fifteen million, five hundred sixty-six thousand, six hundred thirty-four".