1616656510091 has 8 divisors (see below), whose sum is σ = 1847704768224. Its totient is φ = 1385632584000.

The previous prime is 1616656510087. The next prime is 1616656510099. The reversal of 1616656510091 is 1900156566161.

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

It is not a de Polignac number, because 1616656510091 - 2² = 1616656510087 is a prime.

It is a super-2 number, since 2×1616656510091² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616656510099) 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, 5940410 + ... + 6206591.

It is an arithmetic number, because the mean of its divisors is an integer number (230963096028).

Almost surely, 2^{1616656510091} is an apocalyptic number.

1616656510091 is a deficient number, since it is larger than the sum of its proper divisors (231048258133).

1616656510091 is a wasteful number, since it uses less digits than its factorization.

1616656510091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12166021.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 1616656510091 in words is "one trillion, six hundred sixteen billion, six hundred fifty-six million, five hundred ten thousand, ninety-one".