2191266767404 has 48 divisors (see below), whose sum is σ = 4700996778240. Its totient is φ = 879438162240.

The previous prime is 2191266767399. The next prime is 2191266767461. The reversal of 2191266767404 is 4047676621912.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83266974 + ... + 83293285.

It is an arithmetic number, because the mean of its divisors is an integer number (97937432880).

Almost surely, 2^{2191266767404} is an apocalyptic number.

It is an amenable number.

2191266767404 is an abundant number, since it is smaller than the sum of its proper divisors (2509730010836).

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

2191266767404 is a wasteful number, since it uses less digits than its factorization.

2191266767404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166560310 (or 166560308 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 2191266767404 in words is "two trillion, one hundred ninety-one billion, two hundred sixty-six million, seven hundred sixty-seven thousand, four hundred four".