9886542690 has 64 divisors (see below), whose sum is σ = 24070556160. Its totient is φ = 2598435840.

The previous prime is 9886542649. The next prime is 9886542703. The reversal of 9886542690 is 962456889.

It is a super-2 number, since 2×9886542690² (a number of 21 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 9886542690.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1458910 + ... + 1465670.

It is an arithmetic number, because the mean of its divisors is an integer number (376102440).

Almost surely, 2^9886542690 is an apocalyptic number.

9886542690 is an abundant number, since it is smaller than the sum of its proper divisors (14184013470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9886542690 is a wasteful number, since it uses less digits than its factorization.

9886542690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7467.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The square root of 9886542690 is about 99431.0951865663. The cubic root of 9886542690 is about 2146.2558009569.

The spelling of 9886542690 in words is "nine billion, eight hundred eighty-six million, five hundred forty-two thousand, six hundred ninety".