40387273538 has 16 divisors (see below), whose sum is σ = 61109436960. Its totient is φ = 20017795200.

The previous prime is 40387273513. The next prime is 40387273561. The reversal of 40387273538 is 83537278304.

It is a super-2 number, since 2×40387273538² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160433 + ... + 326363.

It is an arithmetic number, because the mean of its divisors is an integer number (3819339810).

Almost surely, 2^40387273538 is an apocalyptic number.

40387273538 is a deficient number, since it is larger than the sum of its proper divisors (20722163422).

40387273538 is a wasteful number, since it uses less digits than its factorization.

40387273538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166993.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 40387273538 in words is "forty billion, three hundred eighty-seven million, two hundred seventy-three thousand, five hundred thirty-eight".