161420103993 has 32 divisors (see below), whose sum is σ = 240280335360. Its totient is φ = 95918264640.

The previous prime is 161420103931. The next prime is 161420103997. The reversal of 161420103993 is 399301024161.

It is a happy number.

It is not a de Polignac number, because 161420103993 - 2⁸ = 161420103737 is a prime.

It is a super-2 number, since 2×161420103993² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161420103997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 929271 + ... + 1089212.

It is an arithmetic number, because the mean of its divisors is an integer number (7508760480).

Almost surely, 2^161420103993 is an apocalyptic number.

It is an amenable number.

161420103993 is a deficient number, since it is larger than the sum of its proper divisors (78860231367).

161420103993 is a wasteful number, since it uses less digits than its factorization.

161420103993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018589.

The product of its (nonzero) digits is 34992, while the sum is 39.

The spelling of 161420103993 in words is "one hundred sixty-one billion, four hundred twenty million, one hundred three thousand, nine hundred ninety-three".