36781381071 has 16 divisors (see below), whose sum is σ = 54510161920. Its totient is φ = 24512268600.

The previous prime is 36781381057. The next prime is 36781381073. The reversal of 36781381071 is 17018318763.

36781381071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 36781381071 - 2³⁵ = 2421642703 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 (36781381073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161935 + ... + 315888.

It is an arithmetic number, because the mean of its divisors is an integer number (3406885120).

Almost surely, 2^36781381071 is an apocalyptic number.

36781381071 is a deficient number, since it is larger than the sum of its proper divisors (17728780849).

36781381071 is a wasteful number, since it uses less digits than its factorization.

36781381071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480683 (or 480677 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 36781381071 in words is "thirty-six billion, seven hundred eighty-one million, three hundred eighty-one thousand, seventy-one".