75823728515 has 4 divisors (see below), whose sum is σ = 90988474224. Its totient is φ = 60658982808.

The previous prime is 75823728473. The next prime is 75823728517. The reversal of 75823728515 is 51582732857.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51582732857 = 373 ⋅138291509.

It is a cyclic number.

It is not a de Polignac number, because 75823728515 - 2⁸ = 75823728259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75823728517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7582372847 + ... + 7582372856.

It is an arithmetic number, because the mean of its divisors is an integer number (22747118556).

Almost surely, 2^75823728515 is an apocalyptic number.

75823728515 is a deficient number, since it is larger than the sum of its proper divisors (15164745709).

75823728515 is a wasteful number, since it uses less digits than its factorization.

75823728515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15164745708.

The product of its digits is 4704000, while the sum is 53.

The spelling of 75823728515 in words is "seventy-five billion, eight hundred twenty-three million, seven hundred twenty-eight thousand, five hundred fifteen".