9856499642 has 32 divisors (see below), whose sum is σ = 16702459200. Its totient is φ = 4321206400.

The previous prime is 9856499629. The next prime is 9856499657. The reversal of 9856499642 is 2469946589.

It is a happy number.

9856499642 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9856499642² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642542 + ... + 657702.

It is an arithmetic number, because the mean of its divisors is an integer number (521951850).

Almost surely, 2^9856499642 is an apocalyptic number.

9856499642 is a deficient number, since it is larger than the sum of its proper divisors (6845959558).

9856499642 is a wasteful number, since it uses less digits than its factorization.

9856499642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16222.

The product of its digits is 33592320, while the sum is 62.

The square root of 9856499642 is about 99279.9055297697. The cubic root of 9856499642 is about 2144.0795939591.

The spelling of 9856499642 in words is "nine billion, eight hundred fifty-six million, four hundred ninety-nine thousand, six hundred forty-two".