75632078381 has 4 divisors (see below), whose sum is σ = 75720745212. Its totient is φ = 75543411552.

The previous prime is 75632078351. The next prime is 75632078393. The reversal of 75632078381 is 18387023657.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41232957481 + 34399120900 = 203059^2 + 185470^2 .

It is a cyclic number.

It is not a de Polignac number, because 75632078381 - 2¹⁰ = 75632077357 is a prime.

It is a super-2 number, since 2×75632078381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75632078351) 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, 44332136 + ... + 44333841.

It is an arithmetic number, because the mean of its divisors is an integer number (18930186303).

Almost surely, 2^75632078381 is an apocalyptic number.

It is an amenable number.

75632078381 is a deficient number, since it is larger than the sum of its proper divisors (88666831).

75632078381 is an equidigital number, since it uses as much as digits as its factorization.

75632078381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88666830.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 75632078381 in words is "seventy-five billion, six hundred thirty-two million, seventy-eight thousand, three hundred eighty-one".