161051672051 has 4 divisors (see below), whose sum is σ = 161053067472. Its totient is φ = 161050276632.

The previous prime is 161051672027. The next prime is 161051672071. The reversal of 161051672051 is 150276150161.

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

It is a cyclic number.

It is not a de Polignac number, because 161051672051 - 2⁶ = 161051671987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161051672011) 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, 507260 + ... + 761193.

It is an arithmetic number, because the mean of its divisors is an integer number (40263266868).

Almost surely, 2^161051672051 is an apocalyptic number.

161051672051 is a deficient number, since it is larger than the sum of its proper divisors (1395421).

161051672051 is a wasteful number, since it uses less digits than its factorization.

161051672051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395420.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 161051672051 in words is "one hundred sixty-one billion, fifty-one million, six hundred seventy-two thousand, fifty-one".