75078157 has 16 divisors (see below), whose sum is σ = 95375232. Its totient is φ = 57395520.

The previous prime is 75078151. The next prime is 75078161. The reversal of 75078157 is 75187057.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-75078157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75078151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5118 + ... + 13279.

It is an arithmetic number, because the mean of its divisors is an integer number (5960952).

Almost surely, 2^75078157 is an apocalyptic number.

75078157 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

75078157 is a deficient number, since it is larger than the sum of its proper divisors (20297075).

75078157 is a wasteful number, since it uses less digits than its factorization.

75078157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18468.

The product of its (nonzero) digits is 68600, while the sum is 40.

The square root of 75078157 is about 8664.7652593709. The cubic root of 75078157 is about 421.8627710548.

Subtracting 75078157 from its reverse (75187057), we obtain a square (108900 = 330²).

The spelling of 75078157 in words is "seventy-five million, seventy-eight thousand, one hundred fifty-seven".