1616431667631 has 64 divisors (see below), whose sum is σ = 2548446105600. Its totient is φ = 900395712000.

The previous prime is 1616431667569. The next prime is 1616431667647. The reversal of 1616431667631 is 1367661346161.

It is not a de Polignac number, because 1616431667631 - 2¹⁰ = 1616431666607 is a prime.

It is a super-2 number, since 2×1616431667631² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616431667671) 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, 4836240 + ... + 5159658.

It is an arithmetic number, because the mean of its divisors is an integer number (39819470400).

Almost surely, 2^{1616431667631} is an apocalyptic number.

1616431667631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1616431667631 is a deficient number, since it is larger than the sum of its proper divisors (932014437969).

1616431667631 is a wasteful number, since it uses less digits than its factorization.

1616431667631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323660.

The product of its digits is 1959552, while the sum is 51.

The spelling of 1616431667631 in words is "one trillion, six hundred sixteen billion, four hundred thirty-one million, six hundred sixty-seven thousand, six hundred thirty-one".