376445544661 has 2 divisors, whose sum is σ = 376445544662. Its totient is φ = 376445544660.

The previous prime is 376445544637. The next prime is 376445544689. The reversal of 376445544661 is 166445544673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345003516900 + 31442027761 = 587370^2 + 177319^2 .

It is an emirp because it is prime and its reverse (166445544673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 376445544661 - 2¹³ = 376445536469 is a prime.

It is a super-2 number, since 2×376445544661² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (376445544361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188222772330 + 188222772331.

It is an arithmetic number, because the mean of its divisors is an integer number (188222772331).

Almost surely, 2^376445544661 is an apocalyptic number.

It is an amenable number.

376445544661 is a deficient number, since it is larger than the sum of its proper divisors (1).

376445544661 is an equidigital number, since it uses as much as digits as its factorization.

376445544661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29030400, while the sum is 55.

The spelling of 376445544661 in words is "three hundred seventy-six billion, four hundred forty-five million, five hundred forty-four thousand, six hundred sixty-one".