16687157761 has 8 divisors (see below), whose sum is σ = 17055442944. Its totient is φ = 16322574240.

The previous prime is 16687157689. The next prime is 16687157783. The reversal of 16687157761 is 16775178661.

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

It is a cyclic number.

It is not a de Polignac number, because 16687157761 - 2⁷ = 16687157633 is a prime.

It is a super-2 number, since 2×16687157761² (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 (16687157161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 916300 + ... + 934333.

It is an arithmetic number, because the mean of its divisors is an integer number (2131930368).

Almost surely, 2^16687157761 is an apocalyptic number.

It is an amenable number.

16687157761 is a deficient number, since it is larger than the sum of its proper divisors (368285183).

16687157761 is a wasteful number, since it uses less digits than its factorization.

16687157761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850831.

The product of its digits is 2963520, while the sum is 55.

The spelling of 16687157761 in words is "sixteen billion, six hundred eighty-seven million, one hundred fifty-seven thousand, seven hundred sixty-one".