9999899578442 has 8 divisors (see below), whose sum is σ = 15140034876096. Its totient is φ = 4953221286412.

The previous prime is 9999899578433. The next prime is 9999899578453. The reversal of 9999899578442 is 2448759989999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×9999899578442² (a number of 27 digits) contains 22 as substring.

It is a pancake number, because a pancake can be divided into 9999899578442 parts by 4472113 straight cuts.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23364251138 + ... + 23364251565.

It is an arithmetic number, because the mean of its divisors is an integer number (1892504359512).

Almost surely, 2^{9999899578442} is an apocalyptic number.

9999899578442 is a deficient number, since it is larger than the sum of its proper divisors (5140135297654).

9999899578442 is a wasteful number, since it uses less digits than its factorization.

9999899578442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46728502812.

The product of its digits is 38093690880, while the sum is 92.

The spelling of 9999899578442 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred ninety-nine million, five hundred seventy-eight thousand, four hundred forty-two".