16550150015661 has 16 divisors (see below), whose sum is σ = 22332675600000. Its totient is φ = 10900727405568.

The previous prime is 16550150015551. The next prime is 16550150015677. The reversal of 16550150015661 is 16651005105561.

It is not a de Polignac number, because 16550150015661 - 2²² = 16550145821357 is a prime.

It is a super-3 number, since 3×16550150015661³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16550150015461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24480601 + ... + 25147566.

It is an arithmetic number, because the mean of its divisors is an integer number (1395792225000).

Almost surely, 2^{16550150015661} is an apocalyptic number.

It is an amenable number.

16550150015661 is a deficient number, since it is larger than the sum of its proper divisors (5782525584339).

16550150015661 is a wasteful number, since it uses less digits than its factorization.

16550150015661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49629508.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 16550150015661 in words is "sixteen trillion, five hundred fifty billion, one hundred fifty million, fifteen thousand, six hundred sixty-one".