73787447161444 has 27 divisors (see below), whose sum is σ = 129312201376267. Its totient is φ = 36841178783168.

The previous prime is 73787447161411. The next prime is 73787447161469. The reversal of 73787447161444 is 44416174478737.

The square root of 73787447161444 is 8589962.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6244691127844 + 67542756033600 = 2498938^2 + 8218440^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73787447161444.

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, 13898555862 + ... + 13898561170.

Almost surely, 2^{73787447161444} is an apocalyptic number.

73787447161444 is the 8589962-nd square number.

It is an amenable number.

73787447161444 is a deficient number, since it is larger than the sum of its proper divisors (55524754214823).

73787447161444 is an frugal number, since it uses more digits than its factorization.

73787447161444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12240 (or 6120 counting only the distinct ones).

The product of its digits is 354041856, while the sum is 67.

The spelling of 73787447161444 in words is "seventy-three trillion, seven hundred eighty-seven billion, four hundred forty-seven million, one hundred sixty-one thousand, four hundred forty-four".