161304460451 has 4 divisors (see below), whose sum is σ = 161372899152. Its totient is φ = 161236021752.

The previous prime is 161304460409. The next prime is 161304460463. The reversal of 161304460451 is 154064403161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154064403161 = 1481 ⋅104027281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161304460451 is a prime.

It is a super-2 number, since 2×161304460451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161304460351) 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, 34215815 + ... + 34220528.

It is an arithmetic number, because the mean of its divisors is an integer number (40343224788).

Almost surely, 2^161304460451 is an apocalyptic number.

161304460451 is a deficient number, since it is larger than the sum of its proper divisors (68438701).

161304460451 is an equidigital number, since it uses as much as digits as its factorization.

161304460451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68438700.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 161304460451 in words is "one hundred sixty-one billion, three hundred four million, four hundred sixty thousand, four hundred fifty-one".