40144044690 has 48 divisors (see below), whose sum is σ = 108240245568. Its totient is φ = 10705077936.

The previous prime is 40144044679. The next prime is 40144044691. The reversal of 40144044690 is 9644044104.

It is a super-2 number, since 2×40144044690² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40144044691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8257662 + ... + 8262521.

It is an arithmetic number, because the mean of its divisors is an integer number (2255005116).

Almost surely, 2^40144044690 is an apocalyptic number.

40144044690 is an abundant number, since it is smaller than the sum of its proper divisors (68096200878).

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

40144044690 is a wasteful number, since it uses less digits than its factorization.

40144044690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16520205 (or 16520193 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

Adding to 40144044690 its reverse (9644044104), we get a palindrome (49788088794).

The spelling of 40144044690 in words is "forty billion, one hundred forty-four million, forty-four thousand, six hundred ninety".