31742578811 has 4 divisors (see below), whose sum is σ = 32216348712. Its totient is φ = 31268808912.

The previous prime is 31742578757. The next prime is 31742578883. The reversal of 31742578811 is 11887524713.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31742578811 - 2²² = 31738384507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31742571811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236884850 + ... + 236884983.

It is an arithmetic number, because the mean of its divisors is an integer number (8054087178).

Almost surely, 2^31742578811 is an apocalyptic number.

31742578811 is a deficient number, since it is larger than the sum of its proper divisors (473769901).

31742578811 is an equidigital number, since it uses as much as digits as its factorization.

31742578811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473769900.

The product of its digits is 376320, while the sum is 47.

The spelling of 31742578811 in words is "thirty-one billion, seven hundred forty-two million, five hundred seventy-eight thousand, eight hundred eleven".