40391177993 has 8 divisors (see below), whose sum is σ = 40704322560. Its totient is φ = 40078106640.

The previous prime is 40391177971. The next prime is 40391178013. The reversal of 40391177993 is 39977119304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40391177993 - 2¹² = 40391173897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40391177903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1731896 + ... + 1755062.

It is an arithmetic number, because the mean of its divisors is an integer number (5088040320).

Almost surely, 2^40391177993 is an apocalyptic number.

It is an amenable number.

40391177993 is a deficient number, since it is larger than the sum of its proper divisors (313144567).

40391177993 is a wasteful number, since it uses less digits than its factorization.

40391177993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36607.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The spelling of 40391177993 in words is "forty billion, three hundred ninety-one million, one hundred seventy-seven thousand, nine hundred ninety-three".