40809897774 has 48 divisors (see below), whose sum is σ = 93721616352. Its totient is φ = 12789579264.

The previous prime is 40809897769. The next prime is 40809897781. The reversal of 40809897774 is 47779890804.

It is a happy number.

40809897774 is a `hidden beast` number, since 408 + 0 + 98 + 9 + 77 + 74 = 666.

40809897774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221647 + ... + 361589.

It is an arithmetic number, because the mean of its divisors is an integer number (1952533674).

Almost surely, 2^40809897774 is an apocalyptic number.

40809897774 is an abundant number, since it is smaller than the sum of its proper divisors (52911718578).

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

40809897774 is a wasteful number, since it uses less digits than its factorization.

40809897774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140921 (or 140918 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The spelling of 40809897774 in words is "forty billion, eight hundred nine million, eight hundred ninety-seven thousand, seven hundred seventy-four".