40191796090 has 12 divisors (see below), whose sum is σ = 72346374126. Its totient is φ = 16076464848.

The previous prime is 40191796067. The next prime is 40191796093. The reversal of 40191796090 is 9069719104.

It can be written as a sum of positive squares in 3 ways, for example, as 27701274969 + 12490521121 = 166437^2 + 111761^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40191796090.

It is not an unprimeable number, because it can be changed into a prime (40191796093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 602272 + ... + 665668.

Almost surely, 2^40191796090 is an apocalyptic number.

40191796090 is a deficient number, since it is larger than the sum of its proper divisors (32154578036).

40191796090 is an frugal number, since it uses more digits than its factorization.

40191796090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126801 (or 63404 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 40191796090 in words is "forty billion, one hundred ninety-one million, seven hundred ninety-six thousand, ninety".