1616445121231 has 8 divisors (see below), whose sum is σ = 1673906763600. Its totient is φ = 1559098289280.

The previous prime is 1616445121229. The next prime is 1616445121243. The reversal of 1616445121231 is 1321215446161.

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 1616445121231 - 2¹ = 1616445121229 is a prime.

It is a super-2 number, since 2×1616445121231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616445121331) 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, 28673946 + ... + 28730263.

It is an arithmetic number, because the mean of its divisors is an integer number (209238345450).

Almost surely, 2^{1616445121231} is an apocalyptic number.

1616445121231 is a deficient number, since it is larger than the sum of its proper divisors (57461642369).

1616445121231 is an equidigital number, since it uses as much as digits as its factorization.

1616445121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57405209.

The product of its digits is 34560, while the sum is 37.

It can be divided in two parts, 161644 and 5121231, that added together give a triangular number (5282875 = T₃₂₅₀).

The spelling of 1616445121231 in words is "one trillion, six hundred sixteen billion, four hundred forty-five million, one hundred twenty-one thousand, two hundred thirty-one".