40001974540 has 24 divisors (see below), whose sum is σ = 91640887632. Its totient is φ = 14546172480.

The previous prime is 40001974531. The next prime is 40001974543. The reversal of 40001974540 is 4547910004.

It is a junction number, because it is equal to n+sod(n) for n = 40001974496 and 40001974505.

It is not an unprimeable number, because it can be changed into a prime (40001974543) 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, 90913359 + ... + 90913798.

It is an arithmetic number, because the mean of its divisors is an integer number (3818370318).

Almost surely, 2^40001974540 is an apocalyptic number.

It is an amenable number.

40001974540 is an abundant number, since it is smaller than the sum of its proper divisors (51638913092).

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

40001974540 is a wasteful number, since it uses less digits than its factorization.

40001974540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181827177 (or 181827175 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 40001974540 in words is "forty billion, one million, nine hundred seventy-four thousand, five hundred forty".