40345543044 has 45 divisors (see below), whose sum is σ = 105480671527. Its totient is φ = 13447309176.

The previous prime is 40345543039. The next prime is 40345543079. The reversal of 40345543044 is 44034554304.

The square root of 40345543044 is 200862.

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

40345543044 is a `hidden beast` number, since 4 + 0 + 34 + 554 + 30 + 44 = 666.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3609937 + ... + 3621095.

Almost surely, 2^40345543044 is an apocalyptic number.

40345543044 is the 200862-nd square number.

It is an amenable number.

40345543044 is an abundant number, since it is smaller than the sum of its proper divisors (65135128483).

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

40345543044 is an frugal number, since it uses more digits than its factorization.

40345543044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22334 (or 11164 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 36.

Multiplying 40345543044 by its sum of digits (36), we get a square (1452439549584 = 1205172²).

40345543044 divided by its sum of digits (36) gives a square (1120709529 = 33477²).

The spelling of 40345543044 in words is "forty billion, three hundred forty-five million, five hundred forty-three thousand, forty-four".