40181390990 has 24 divisors (see below), whose sum is σ = 78318051768. Its totient is φ = 14836205280.

The previous prime is 40181390983. The next prime is 40181391067. The reversal of 40181390990 is 9909318104.

It is a super-2 number, since 2×40181390990² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11886296 + ... + 11889675.

It is an arithmetic number, because the mean of its divisors is an integer number (3263252157).

Almost surely, 2^40181390990 is an apocalyptic number.

40181390990 is a deficient number, since it is larger than the sum of its proper divisors (38136660778).

40181390990 is a wasteful number, since it uses less digits than its factorization.

40181390990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23776004 (or 23775991 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 40181390990 in words is "forty billion, one hundred eighty-one million, three hundred ninety thousand, nine hundred ninety".