11949474040 has 32 divisors (see below), whose sum is σ = 30727219680. Its totient is φ = 4096962432.

The previous prime is 11949474023. The next prime is 11949474049. The reversal of 11949474040 is 4047494911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11949474049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21338067 + ... + 21338626.

It is an arithmetic number, because the mean of its divisors is an integer number (960225615).

Almost surely, 2^11949474040 is an apocalyptic number.

11949474040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11949474040 is an abundant number, since it is smaller than the sum of its proper divisors (18777745640).

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

11949474040 is a wasteful number, since it uses less digits than its factorization.

11949474040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42676711 (or 42676707 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 11949474040 in words is "eleven billion, nine hundred forty-nine million, four hundred seventy-four thousand, forty".