40180277644 has 12 divisors (see below), whose sum is σ = 75724369504. Its totient is φ = 18544743504.

The previous prime is 40180277609. The next prime is 40180277707. The reversal of 40180277644 is 44677208104.

40180277644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40180277644² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40180277644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386348772 + ... + 386348875.

Almost surely, 2^40180277644 is an apocalyptic number.

It is an amenable number.

40180277644 is a deficient number, since it is larger than the sum of its proper divisors (35544091860).

40180277644 is a wasteful number, since it uses less digits than its factorization.

40180277644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772697664 (or 772697662 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 40180277644 in words is "forty billion, one hundred eighty million, two hundred seventy-seven thousand, six hundred forty-four".