75081816 has 80 divisors (see below), whose sum is σ = 212427600. Its totient is φ = 24774336.

The previous prime is 75081791. The next prime is 75081857. The reversal of 75081816 is 61818057.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70101 + ... + 71163.

It is an arithmetic number, because the mean of its divisors is an integer number (2655345).

Almost surely, 2^75081816 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 75081816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106213800).

75081816 is an abundant number, since it is smaller than the sum of its proper divisors (137345784).

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

75081816 is a wasteful number, since it uses less digits than its factorization.

75081816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 75081816 is about 8664.9763992754. The cubic root of 75081816 is about 421.8696242278.

The spelling of 75081816 in words is "seventy-five million, eighty-one thousand, eight hundred sixteen".