999975552 has 64 divisors (see below), whose sum is σ = 2663097600. Its totient is φ = 332457984.

The previous prime is 999975551. The next prime is 999975553. The reversal of 999975552 is 255579999.

It is an interprime number because it is at equal distance from previous prime (999975551) and next prime (999975553).

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×999975552² = 1999902209195409408, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (999975551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153873 + ... + 160239.

It is an arithmetic number, because the mean of its divisors is an integer number (41610900).

Almost surely, 2^999975552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999975552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1331548800).

999975552 is an abundant number, since it is smaller than the sum of its proper divisors (1663122048).

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

999975552 is a wasteful number, since it uses less digits than its factorization.

999975552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6793 (or 6781 counting only the distinct ones).

The product of its digits is 11481750, while the sum is 60.

The square root of 999975552 is about 31622.3900425000. The cubic root of 999975552 is about 999.9918506003.

The spelling of 999975552 in words is "nine hundred ninety-nine million, nine hundred seventy-five thousand, five hundred fifty-two".