161464456 has 8 divisors (see below), whose sum is σ = 302745870. Its totient is φ = 80732224.

The previous prime is 161464409. The next prime is 161464463. The reversal of 161464456 is 654464161.

It can be written as a sum of positive squares in only one way, i.e., 159012100 + 2452356 = 12610^2 + 1566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10091521 + ... + 10091536.

Almost surely, 2^161464456 is an apocalyptic number.

It is an amenable number.

161464456 is a deficient number, since it is larger than the sum of its proper divisors (141281414).

161464456 is a wasteful number, since it uses less digits than its factorization.

161464456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20183063 (or 20183059 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 161464456 is about 12706.8664902091. The cubic root of 161464456 is about 544.5348060239.

It can be divided in two parts, 16146 and 4456, that added together give a palindrome (20602).

The spelling of 161464456 in words is "one hundred sixty-one million, four hundred sixty-four thousand, four hundred fifty-six".