1006455699581 has 2 divisors, whose sum is σ = 1006455699582. Its totient is φ = 1006455699580.

The previous prime is 1006455699527. The next prime is 1006455699671. The reversal of 1006455699581 is 1859965546001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782457008356 + 223998691225 = 884566^2 + 473285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006455699581 - 2³⁰ = 1005381957757 is a prime.

It is a super-2 number, since 2×1006455699581² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1006455699581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1006455669581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503227849790 + 503227849791.

It is an arithmetic number, because the mean of its divisors is an integer number (503227849791).

Almost surely, 2^{1006455699581} is an apocalyptic number.

It is an amenable number.

1006455699581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006455699581 is an equidigital number, since it uses as much as digits as its factorization.

1006455699581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664000, while the sum is 59.

The spelling of 1006455699581 in words is "one trillion, six billion, four hundred fifty-five million, six hundred ninety-nine thousand, five hundred eighty-one".