40387869671 has 4 divisors (see below), whose sum is σ = 40422598152. Its totient is φ = 40353141192.

The previous prime is 40387869667. The next prime is 40387869701. The reversal of 40387869671 is 17696878304.

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 40387869671 - 2² = 40387869667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40387869671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40387869601) 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, 17362496 + ... + 17364821.

It is an arithmetic number, because the mean of its divisors is an integer number (10105649538).

Almost surely, 2^40387869671 is an apocalyptic number.

40387869671 is a deficient number, since it is larger than the sum of its proper divisors (34728481).

40387869671 is a wasteful number, since it uses less digits than its factorization.

40387869671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34728480.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 40387869671 in words is "forty billion, three hundred eighty-seven million, eight hundred sixty-nine thousand, six hundred seventy-one".