75819649 has 4 divisors (see below), whose sum is σ = 75841840. Its totient is φ = 75797460.

The previous prime is 75819629. The next prime is 75819673. The reversal of 75819649 is 94691857.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94691857 = 13 ⋅7283989.

It is a cyclic number.

It is not a de Polignac number, because 75819649 - 2¹¹ = 75817601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75819629) 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, 4767 + ... + 13204.

It is an arithmetic number, because the mean of its divisors is an integer number (18960460).

Almost surely, 2^75819649 is an apocalyptic number.

It is an amenable number.

75819649 is a deficient number, since it is larger than the sum of its proper divisors (22191).

75819649 is a wasteful number, since it uses less digits than its factorization.

75819649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22190.

The product of its digits is 544320, while the sum is 49.

The square root of 75819649 is about 8707.4479039498. The cubic root of 75819649 is about 423.2470338203.

The spelling of 75819649 in words is "seventy-five million, eight hundred nineteen thousand, six hundred forty-nine".