161438119783 has 4 divisors (see below), whose sum is σ = 161507319768. Its totient is φ = 161368919800.

The previous prime is 161438119763. The next prime is 161438119807. The reversal of 161438119783 is 387911834161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161438119783 is a prime.

It is a super-4 number, since 4×161438119783⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161438119783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161438119763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34596493 + ... + 34601158.

It is an arithmetic number, because the mean of its divisors is an integer number (40376829942).

Almost surely, 2^161438119783 is an apocalyptic number.

161438119783 is a deficient number, since it is larger than the sum of its proper divisors (69199985).

161438119783 is an equidigital number, since it uses as much as digits as its factorization.

161438119783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69199984.

The product of its digits is 870912, while the sum is 52.

The spelling of 161438119783 in words is "one hundred sixty-one billion, four hundred thirty-eight million, one hundred nineteen thousand, seven hundred eighty-three".