40887778837 has 4 divisors (see below), whose sum is σ = 43292942316. Its totient is φ = 38482615360.

The previous prime is 40887778823. The next prime is 40887778843. The reversal of 40887778837 is 73887778804.

40887778837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30810429841 + 10077348996 = 175529^2 + 100386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40887778837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40887778237) 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, 1202581714 + ... + 1202581747.

It is an arithmetic number, because the mean of its divisors is an integer number (10823235579).

Almost surely, 2^40887778837 is an apocalyptic number.

It is an amenable number.

40887778837 is a deficient number, since it is larger than the sum of its proper divisors (2405163479).

40887778837 is a wasteful number, since it uses less digits than its factorization.

40887778837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405163478.

The product of its (nonzero) digits is 118013952, while the sum is 67.

The spelling of 40887778837 in words is "forty billion, eight hundred eighty-seven million, seven hundred seventy-eight thousand, eight hundred thirty-seven".