75520491 has 8 divisors (see below), whose sum is σ = 100735440. Its totient is φ = 50326272.

The previous prime is 75520481. The next prime is 75520517. The reversal of 75520491 is 19402557.

75520491 is nontrivially palindromic in base 15.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75520491 - 2⁷ = 75520363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75520411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8431 + ... + 14903.

It is an arithmetic number, because the mean of its divisors is an integer number (12591930).

Almost surely, 2^75520491 is an apocalyptic number.

75520491 is a deficient number, since it is larger than the sum of its proper divisors (25214949).

75520491 is a wasteful number, since it uses less digits than its factorization.

75520491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 75520491 is about 8690.2526430478. The cubic root of 75520491 is about 422.6896381509.

The spelling of 75520491 in words is "seventy-five million, five hundred twenty thousand, four hundred ninety-one".