161093773451 has 4 divisors (see below), whose sum is σ = 173485602192. Its totient is φ = 148701944712.

The previous prime is 161093773439. The next prime is 161093773459. The reversal of 161093773451 is 154377390161.

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-161093773451 is a prime.

It is a super-2 number, since 2×161093773451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161093773396 and 161093773405.

It is not an unprimeable number, because it can be changed into a prime (161093773459) 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, 6195914351 + ... + 6195914376.

It is an arithmetic number, because the mean of its divisors is an integer number (43371400548).

Almost surely, 2^161093773451 is an apocalyptic number.

161093773451 is a deficient number, since it is larger than the sum of its proper divisors (12391828741).

161093773451 is a wasteful number, since it uses less digits than its factorization.

161093773451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12391828740.

The product of its (nonzero) digits is 476280, while the sum is 47.

The spelling of 161093773451 in words is "one hundred sixty-one billion, ninety-three million, seven hundred seventy-three thousand, four hundred fifty-one".