36874696781 has 4 divisors (see below), whose sum is σ = 39711211932. Its totient is φ = 34038181632.

The previous prime is 36874696777. The next prime is 36874696879. The reversal of 36874696781 is 18769647863.

36874696781 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 an emirpimes, since its reverse is a distinct semiprime: 18769647863 = 577 ⋅32529719.

It can be written as a sum of positive squares in 2 ways, for example, as 18130622500 + 18744074281 = 134650^2 + 136909^2 .

It is not a de Polignac number, because 36874696781 - 2² = 36874696777 is a prime.

It is a super-2 number, since 2×36874696781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36874699781) 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, 1418257556 + ... + 1418257581.

It is an arithmetic number, because the mean of its divisors is an integer number (9927802983).

Almost surely, 2^36874696781 is an apocalyptic number.

It is an amenable number.

36874696781 is a deficient number, since it is larger than the sum of its proper divisors (2836515151).

36874696781 is a wasteful number, since it uses less digits than its factorization.

36874696781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836515150.

The product of its digits is 73156608, while the sum is 65.

The spelling of 36874696781 in words is "thirty-six billion, eight hundred seventy-four million, six hundred ninety-six thousand, seven hundred eighty-one".