3662120861989 has 2 divisors, whose sum is σ = 3662120861990. Its totient is φ = 3662120861988.

The previous prime is 3662120861977. The next prime is 3662120862007. The reversal of 3662120861989 is 9891680212663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3503792472964 + 158328389025 = 1871842^2 + 397905^2 .

It is a cyclic number.

It is not a de Polignac number, because 3662120861989 - 2⁵ = 3662120861957 is a prime.

It is a super-2 number, since 2×3662120861989² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3662120861489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1831060430994 + 1831060430995.

It is an arithmetic number, because the mean of its divisors is an integer number (1831060430995).

Almost surely, 2^{3662120861989} is an apocalyptic number.

It is an amenable number.

3662120861989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3662120861989 is an equidigital number, since it uses as much as digits as its factorization.

3662120861989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13436928, while the sum is 61.

The spelling of 3662120861989 in words is "three trillion, six hundred sixty-two billion, one hundred twenty million, eight hundred sixty-one thousand, nine hundred eighty-nine".