16061515657 has 4 divisors (see below), whose sum is σ = 17521653456. Its totient is φ = 14601377860.

The previous prime is 16061515637. The next prime is 16061515693. The reversal of 16061515657 is 75651516061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16061515657 - 2¹¹ = 16061513609 is a prime.

It is a super-2 number, since 2×16061515657² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16061515637) 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, 730068883 + ... + 730068904.

It is an arithmetic number, because the mean of its divisors is an integer number (4380413364).

Almost surely, 2^16061515657 is an apocalyptic number.

It is an amenable number.

16061515657 is a deficient number, since it is larger than the sum of its proper divisors (1460137799).

16061515657 is a wasteful number, since it uses less digits than its factorization.

16061515657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460137798.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 16061515657 in words is "sixteen billion, sixty-one million, five hundred fifteen thousand, six hundred fifty-seven".