9901691068 has 18 divisors (see below), whose sum is σ = 17461364648. Its totient is φ = 4913018760.

The previous prime is 9901691057. The next prime is 9901691071. The reversal of 9901691068 is 8601961099.

It is a super-2 number, since 2×9901691068² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3480 + ... + 140767.

Almost surely, 2^9901691068 is an apocalyptic number.

It is an amenable number.

9901691068 is a deficient number, since it is larger than the sum of its proper divisors (7559673580).

9901691068 is a wasteful number, since it uses less digits than its factorization.

9901691068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144513 (or 144380 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 9901691068 is about 99507.2412842402. The cubic root of 9901691068 is about 2147.3514216724.

The spelling of 9901691068 in words is "nine billion, nine hundred one million, six hundred ninety-one thousand, sixty-eight".