36842051621 has 2 divisors, whose sum is σ = 36842051622. Its totient is φ = 36842051620.

The previous prime is 36842051591. The next prime is 36842051639. The reversal of 36842051621 is 12615024863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21320380225 + 15521671396 = 146015^2 + 124586^2 .

It is a cyclic number.

It is not a de Polignac number, because 36842051621 - 2¹⁸ = 36841789477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36842051641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18421025810 + 18421025811.

It is an arithmetic number, because the mean of its divisors is an integer number (18421025811).

Almost surely, 2^36842051621 is an apocalyptic number.

It is an amenable number.

36842051621 is a deficient number, since it is larger than the sum of its proper divisors (1).

36842051621 is an equidigital number, since it uses as much as digits as its factorization.

36842051621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 36842051621 in words is "thirty-six billion, eight hundred forty-two million, fifty-one thousand, six hundred twenty-one".