9864400542 has 32 divisors (see below), whose sum is σ = 19859481600. Its totient is φ = 3266425440.

The previous prime is 9864400541. The next prime is 9864400571. The reversal of 9864400542 is 2450044689.

It is a junction number, because it is equal to n+sod(n) for n = 9864400494 and 9864400503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9864400541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558783 + ... + 576165.

It is an arithmetic number, because the mean of its divisors is an integer number (620608800).

Almost surely, 2^9864400542 is an apocalyptic number.

9864400542 is an abundant number, since it is smaller than the sum of its proper divisors (9995081058).

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

9864400542 is a wasteful number, since it uses less digits than its factorization.

9864400542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18008.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 9864400542 is about 99319.6885919403. The cubic root of 9864400542 is about 2144.6523339352.

The spelling of 9864400542 in words is "nine billion, eight hundred sixty-four million, four hundred thousand, five hundred forty-two".