16601616031 has 64 divisors (see below), whose sum is σ = 23500947456. Its totient is φ = 11309155200.

The previous prime is 16601616019. The next prime is 16601616049. The reversal of 16601616031 is 13061610661.

It is not a de Polignac number, because 16601616031 - 2⁷ = 16601615903 is a prime.

It is a super-2 number, since 2×16601616031² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 16601615984 and 16601616002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16601616331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1452766 + ... + 1464148.

It is an arithmetic number, because the mean of its divisors is an integer number (367202304).

Almost surely, 2^16601616031 is an apocalyptic number.

16601616031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16601616031 is a deficient number, since it is larger than the sum of its proper divisors (6899331425).

16601616031 is a wasteful number, since it uses less digits than its factorization.

16601616031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11492.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 16601616031 in words is "sixteen billion, six hundred one million, six hundred sixteen thousand, thirty-one".