999955554468 has 36 divisors (see below), whose sum is σ = 2526514926768. Its totient is φ = 307678631520.

The previous prime is 999955554467. The next prime is 999955554469. The reversal of 999955554468 is 864455559999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (999955554467) and next prime (999955554469).

It is a super-2 number, since 2×999955554468² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a junction number, because it is equal to n+sod(n) for n = 999955554393 and 999955554402.

It is not an unprimeable number, because it can be changed into a prime (999955554467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246535338 + ... + 246539393.

It is an arithmetic number, because the mean of its divisors is an integer number (70180970188).

Almost surely, 2^999955554468 is an apocalyptic number.

It is an amenable number.

999955554468 is an abundant number, since it is smaller than the sum of its proper divisors (1526559372300).

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

999955554468 is a wasteful number, since it uses less digits than its factorization.

999955554468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493074764 (or 493074749 counting only the distinct ones).

The product of its digits is 3149280000, while the sum is 78.

The spelling of 999955554468 in words is "nine hundred ninety-nine billion, nine hundred fifty-five million, five hundred fifty-four thousand, four hundred sixty-eight".