40376780261 has 4 divisors (see below), whose sum is σ = 40388128800. Its totient is φ = 40365431724.

The previous prime is 40376780251. The next prime is 40376780317. The reversal of 40376780261 is 16208767304.

40376780261 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40376780261 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 (40376780231) 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, 5668931 + ... + 5676048.

It is an arithmetic number, because the mean of its divisors is an integer number (10097032200).

Almost surely, 2^40376780261 is an apocalyptic number.

It is an amenable number.

40376780261 is a deficient number, since it is larger than the sum of its proper divisors (11348539).

40376780261 is a wasteful number, since it uses less digits than its factorization.

40376780261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11348538.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 40376780261 in words is "forty billion, three hundred seventy-six million, seven hundred eighty thousand, two hundred sixty-one".