5615322640661 has 2 divisors, whose sum is σ = 5615322640662. Its totient is φ = 5615322640660.

The previous prime is 5615322640523. The next prime is 5615322640673. The reversal of 5615322640661 is 1660462235165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3807548274436 + 1807774366225 = 1951294^2 + 1344535^2 .

It is a cyclic number.

It is not a de Polignac number, because 5615322640661 - 2²⁶ = 5615255531797 is a prime.

It is a super-2 number, since 2×5615322640661² (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 (5615322640691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2807661320330 + 2807661320331.

It is an arithmetic number, because the mean of its divisors is an integer number (2807661320331).

Almost surely, 2^{5615322640661} is an apocalyptic number.

It is an amenable number.

5615322640661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5615322640661 is an equidigital number, since it uses as much as digits as its factorization.

5615322640661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 5615322640661 in words is "five trillion, six hundred fifteen billion, three hundred twenty-two million, six hundred forty thousand, six hundred sixty-one".