161040084804 has 27 divisors (see below), whose sum is σ = 407079634143. Its totient is φ = 53679225672.

The previous prime is 161040084781. The next prime is 161040084811. The reversal of 161040084804 is 408480040161.

The square root of 161040084804 is 401298.

It is a perfect power (a square), and thus also a powerful number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2374347 + ... + 2441229.

Almost surely, 2^161040084804 is an apocalyptic number.

161040084804 is the 401298-th square number.

It is an amenable number.

161040084804 is an abundant number, since it is smaller than the sum of its proper divisors (246039549339).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161040084804 is an frugal number, since it uses more digits than its factorization.

161040084804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133776 (or 66888 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

Multiplying 161040084804 by its sum of digits (36), we get a square (5797443052944 = 2407788²).

161040084804 divided by its sum of digits (36) gives a square (4473335689 = 66883²).

It can be divided in two parts, 1610400 and 84804, that added together give a square (1695204 = 1302²).

The spelling of 161040084804 in words is "one hundred sixty-one billion, forty million, eighty-four thousand, eight hundred four".