75555550 has 36 divisors (see below), whose sum is σ = 163482840. Its totient is φ = 25903920.

The previous prime is 75555541. The next prime is 75555551. The reversal of 75555550 is 5555557.

It is a super-2 number, since 2×75555550² = 11417282271605000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75555551) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12970 + ... + 17869.

It is an arithmetic number, because the mean of its divisors is an integer number (4541190).

Almost surely, 2^75555550 is an apocalyptic number.

75555550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

75555550 is an abundant number, since it is smaller than the sum of its proper divisors (87927290).

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

75555550 is a wasteful number, since it uses less digits than its factorization.

75555550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30865 (or 30853 counting only the distinct ones).

The product of its (nonzero) digits is 109375, while the sum is 37.

The square root of 75555550 is about 8692.2695540348. The cubic root of 75555550 is about 422.7550366640.

The spelling of 75555550 in words is "seventy-five million, five hundred fifty-five thousand, five hundred fifty".