909611249940 has 72 divisors (see below), whose sum is σ = 2759465243808. Its totient is φ = 242535648960.

The previous prime is 909611249893. The next prime is 909611249941. The reversal of 909611249940 is 49942116909.

909611249940 is a `hidden beast` number, since 90 + 9 + 61 + 1 + 2 + 499 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909611249941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1341579 + ... + 1902381.

It is an arithmetic number, because the mean of its divisors is an integer number (38325906164).

Almost surely, 2^909611249940 is an apocalyptic number.

909611249940 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

909611249940 is an abundant number, since it is smaller than the sum of its proper divisors (1849853993868).

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

909611249940 is a wasteful number, since it uses less digits than its factorization.

909611249940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569829 (or 569824 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 909611249940 in words is "nine hundred nine billion, six hundred eleven million, two hundred forty-nine thousand, nine hundred forty".