1615642074671 has 2 divisors, whose sum is σ = 1615642074672. Its totient is φ = 1615642074670.

The previous prime is 1615642074667. The next prime is 1615642074719. The reversal of 1615642074671 is 1764702465161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1615642074671 - 2² = 1615642074667 is a prime.

It is a super-2 number, since 2×1615642074671² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1615642004671) 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, 807821037335 + 807821037336.

It is an arithmetic number, because the mean of its divisors is an integer number (807821037336).

Almost surely, 2^{1615642074671} is an apocalyptic number.

1615642074671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615642074671 is an equidigital number, since it uses as much as digits as its factorization.

1615642074671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 1615642074671 in words is "one trillion, six hundred fifteen billion, six hundred forty-two million, seventy-four thousand, six hundred seventy-one".