36402377851781 has 4 divisors (see below), whose sum is σ = 36402452462700. Its totient is φ = 36402303240864.

The previous prime is 36402377851769. The next prime is 36402377851811. The reversal of 36402377851781 is 18715877320463.

It is a happy number.

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 19107966442756 + 17294411409025 = 4371266^2 + 4158655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36402377851781 is a prime.

It is a super-2 number, since 2×36402377851781² (a number of 28 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 (36402377851751) 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, 36568766 + ... + 37551023.

It is an arithmetic number, because the mean of its divisors is an integer number (9100613115675).

Almost surely, 2^{36402377851781} is an apocalyptic number.

It is an amenable number.

36402377851781 is a deficient number, since it is larger than the sum of its proper divisors (74610919).

36402377851781 is an equidigital number, since it uses as much as digits as its factorization.

36402377851781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74610918.

The product of its (nonzero) digits is 47416320, while the sum is 62.

The spelling of 36402377851781 in words is "thirty-six trillion, four hundred two billion, three hundred seventy-seven million, eight hundred fifty-one thousand, seven hundred eighty-one".