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9997142694 = 2371122331289
BaseRepresentation
bin10010100111110000…
…00100101010100110
3221210201101110122020
421103320010222212
5130433232031234
64332001244010
7502511211420
oct112370045246
927721343566
109997142694
114270143300
121b30033606
13c34229a66
146aba1b810
153d79e6549
hex253e04aa6

9997142694 has 288 divisors, whose sum is σ = 27385827840. Its totient is φ = 2376633600.

The previous prime is 9997142681. The next prime is 9997142699. The reversal of 9997142694 is 4962417999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997142699) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 112327402 + ... + 112327490.

It is an arithmetic number, because the mean of its divisors is an integer number (95089680).

Almost surely, 29997142694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9997142694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13692913920).

9997142694 is an abundant number, since it is smaller than the sum of its proper divisors (17388685146).

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

9997142694 is a wasteful number, since it uses less digits than its factorization.

9997142694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 166 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 60.

The square root of 9997142694 is about 99985.7124493295. The cubic root of 9997142694 is about 2154.2294745130.

The spelling of 9997142694 in words is "nine billion, nine hundred ninety-seven million, one hundred forty-two thousand, six hundred ninety-four".