40407661890 has 64 divisors (see below), whose sum is σ = 110666056320. Its totient is φ = 10484147520.

The previous prime is 40407661873. The next prime is 40407661901. The reversal of 40407661890 is 9816670404.

40407661890 is a `hidden beast` number, since 4 + 0 + 407 + 66 + 189 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2012416 + ... + 2032395.

It is an arithmetic number, because the mean of its divisors is an integer number (1729157130).

Almost surely, 2^40407661890 is an apocalyptic number.

40407661890 is an abundant number, since it is smaller than the sum of its proper divisors (70258394430).

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

40407661890 is a wasteful number, since it uses less digits than its factorization.

40407661890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044864 (or 4044858 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 40407661890 in words is "forty billion, four hundred seven million, six hundred sixty-one thousand, eight hundred ninety".