161003949431 has 8 divisors (see below), whose sum is σ = 174552554400. Its totient is φ = 147621585312.

The previous prime is 161003949373. The next prime is 161003949437. The reversal of 161003949431 is 134949300161.

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 161003949431 - 2²⁶ = 160936840567 is a prime.

It is a super-2 number, since 2×161003949431² (a number of 23 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 (161003949437) 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, 41558195 + ... + 41562068.

It is an arithmetic number, because the mean of its divisors is an integer number (21819069300).

Almost surely, 2^161003949431 is an apocalyptic number.

161003949431 is a deficient number, since it is larger than the sum of its proper divisors (13548604969).

161003949431 is a wasteful number, since it uses less digits than its factorization.

161003949431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83120425.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 161003949431 in words is "one hundred sixty-one billion, three million, nine hundred forty-nine thousand, four hundred thirty-one".