36706778828621 has 24 divisors (see below), whose sum is σ = 40393241808192. Its totient is φ = 33331662267200.

The previous prime is 36706778828579. The next prime is 36706778828627. The reversal of 36706778828621 is 12682887760763.

It is not a de Polignac number, because 36706778828621 - 2¹⁸ = 36706778566477 is a prime.

It is a super-2 number, since 2×36706778828621² (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 (36706778828627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1329412106 + ... + 1329439716.

It is an arithmetic number, because the mean of its divisors is an integer number (1683051742008).

Almost surely, 2^{36706778828621} is an apocalyptic number.

It is an amenable number.

36706778828621 is a deficient number, since it is larger than the sum of its proper divisors (3686462979571).

36706778828621 is a wasteful number, since it uses less digits than its factorization.

36706778828621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39793 (or 39782 counting only the distinct ones).

The product of its (nonzero) digits is 455196672, while the sum is 71.

The spelling of 36706778828621 in words is "thirty-six trillion, seven hundred six billion, seven hundred seventy-eight million, eight hundred twenty-eight thousand, six hundred twenty-one".