73234032400561 has 4 divisors (see below), whose sum is σ = 74615806596852. Its totient is φ = 71852258204272.

The previous prime is 73234032400559. The next prime is 73234032400663. The reversal of 73234032400561 is 16500423043237.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45665914614336 + 27568117786225 = 6757656^2 + 5250535^2 .

It is a cyclic number.

It is not a de Polignac number, because 73234032400561 - 2¹ = 73234032400559 is a prime.

It is a super-2 number, since 2×73234032400561² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73234032400531) 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, 690887098066 + ... + 690887098171.

It is an arithmetic number, because the mean of its divisors is an integer number (18653951649213).

Almost surely, 2^{73234032400561} is an apocalyptic number.

It is an amenable number.

73234032400561 is a deficient number, since it is larger than the sum of its proper divisors (1381774196291).

73234032400561 is a wasteful number, since it uses less digits than its factorization.

73234032400561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381774196290.

The product of its (nonzero) digits is 362880, while the sum is 40.

Adding to 73234032400561 its reverse (16500423043237), we get a palindrome (89734455443798).

The spelling of 73234032400561 in words is "seventy-three trillion, two hundred thirty-four billion, thirty-two million, four hundred thousand, five hundred sixty-one".