37365854221 has 2 divisors, whose sum is σ = 37365854222. Its totient is φ = 37365854220.

The previous prime is 37365854167. The next prime is 37365854287. The reversal of 37365854221 is 12245856373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31311302500 + 6054551721 = 176950^2 + 77811^2 .

It is an emirp because it is prime and its reverse (12245856373) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37365854221 is a prime.

It is a super-3 number, since 3×37365854221³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37365854291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18682927110 + 18682927111.

It is an arithmetic number, because the mean of its divisors is an integer number (18682927111).

Almost surely, 2^37365854221 is an apocalyptic number.

It is an amenable number.

37365854221 is a deficient number, since it is larger than the sum of its proper divisors (1).

37365854221 is an equidigital number, since it uses as much as digits as its factorization.

37365854221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 46.

The spelling of 37365854221 in words is "thirty-seven billion, three hundred sixty-five million, eight hundred fifty-four thousand, two hundred twenty-one".