40147109791 has 4 divisors (see below), whose sum is σ = 40149422584. Its totient is φ = 40144797000.

The previous prime is 40147109771. The next prime is 40147109819. The reversal of 40147109791 is 19790174104.

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 40147109791 - 2⁹ = 40147109279 is a prime.

It is a super-2 number, since 2×40147109791² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40147109701) 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, 1130160 + ... + 1165141.

It is an arithmetic number, because the mean of its divisors is an integer number (10037355646).

Almost surely, 2^40147109791 is an apocalyptic number.

40147109791 is a deficient number, since it is larger than the sum of its proper divisors (2312793).

40147109791 is a wasteful number, since it uses less digits than its factorization.

40147109791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312792.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 40147109791 in words is "forty billion, one hundred forty-seven million, one hundred nine thousand, seven hundred ninety-one".