40869117931 has 4 divisors (see below), whose sum is σ = 40880194264. Its totient is φ = 40858041600.

The previous prime is 40869117923. The next prime is 40869118007. The reversal of 40869117931 is 13971196804.

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 40869117931 - 2³ = 40869117923 is a prime.

It is a super-2 number, since 2×40869117931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40861117931) 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, 5532630 + ... + 5540011.

It is an arithmetic number, because the mean of its divisors is an integer number (10220048566).

Almost surely, 2^40869117931 is an apocalyptic number.

40869117931 is a deficient number, since it is larger than the sum of its proper divisors (11076333).

40869117931 is a wasteful number, since it uses less digits than its factorization.

40869117931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11076332.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 40869117931 in words is "forty billion, eight hundred sixty-nine million, one hundred seventeen thousand, nine hundred thirty-one".