1581010663696 has 20 divisors (see below), whose sum is σ = 3083494312384. Its totient is φ = 785270196000.

The previous prime is 1581010663691. The next prime is 1581010663699. The reversal of 1581010663696 is 6963660101851.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1581010663691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327193500 + ... + 327198331.

Almost surely, 2^{1581010663696} is an apocalyptic number.

1581010663696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1581010663696 is a deficient number, since it is larger than the sum of its proper divisors (1502483648688).

1581010663696 is a wasteful number, since it uses less digits than its factorization.

1581010663696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654391990 (or 654391984 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 1581010663696 in words is "one trillion, five hundred eighty-one billion, ten million, six hundred sixty-three thousand, six hundred ninety-six".