15557161667 has 4 divisors (see below), whose sum is σ = 15557412120. Its totient is φ = 15556911216.

The previous prime is 15557161649. The next prime is 15557161687. The reversal of 15557161667 is 76616175551.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 15557161667 - 2¹⁶ = 15557096131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15557161637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45884 + ... + 182262.

It is an arithmetic number, because the mean of its divisors is an integer number (3889353030).

Almost surely, 2^15557161667 is an apocalyptic number.

15557161667 is a deficient number, since it is larger than the sum of its proper divisors (250453).

15557161667 is a wasteful number, since it uses less digits than its factorization.

15557161667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250452.

The product of its digits is 1323000, while the sum is 50.

The spelling of 15557161667 in words is "fifteen billion, five hundred fifty-seven million, one hundred sixty-one thousand, six hundred sixty-seven".