40878949393 has 4 divisors (see below), whose sum is σ = 40907358720. Its totient is φ = 40850540068.

The previous prime is 40878949351. The next prime is 40878949403. The reversal of 40878949393 is 39394987804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40878949393 - 2³³ = 32289014801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40878949333) 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, 14202505 + ... + 14205382.

It is an arithmetic number, because the mean of its divisors is an integer number (10226839680).

Almost surely, 2^40878949393 is an apocalyptic number.

It is an amenable number.

40878949393 is a deficient number, since it is larger than the sum of its proper divisors (28409327).

40878949393 is a wasteful number, since it uses less digits than its factorization.

40878949393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28409326.

The product of its (nonzero) digits is 47029248, while the sum is 64.

The spelling of 40878949393 in words is "forty billion, eight hundred seventy-eight million, nine hundred forty-nine thousand, three hundred ninety-three".