37561216213 has 2 divisors, whose sum is σ = 37561216214. Its totient is φ = 37561216212.

The previous prime is 37561216153. The next prime is 37561216241. The reversal of 37561216213 is 31261216573.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37449216324 + 111999889 = 193518^2 + 10583^2 .

It is an emirp because it is prime and its reverse (31261216573) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37561216213 - 2¹³ = 37561208021 is a prime.

It is a super-2 number, since 2×37561216213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37561216243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18780608106 + 18780608107.

It is an arithmetic number, because the mean of its divisors is an integer number (18780608107).

Almost surely, 2^37561216213 is an apocalyptic number.

It is an amenable number.

37561216213 is a deficient number, since it is larger than the sum of its proper divisors (1).

37561216213 is an equidigital number, since it uses as much as digits as its factorization.

37561216213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The spelling of 37561216213 in words is "thirty-seven billion, five hundred sixty-one million, two hundred sixteen thousand, two hundred thirteen".