75813920947 has 4 divisors (see below), whose sum is σ = 76002983496. Its totient is φ = 75624858400.

The previous prime is 75813920933. The next prime is 75813920969. The reversal of 75813920947 is 74902931857.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75813920947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75813920927) 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, 94530673 + ... + 94531474.

It is an arithmetic number, because the mean of its divisors is an integer number (19000745874).

Almost surely, 2^75813920947 is an apocalyptic number.

75813920947 is a deficient number, since it is larger than the sum of its proper divisors (189062549).

75813920947 is a wasteful number, since it uses less digits than its factorization.

75813920947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189062548.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 75813920947 in words is "seventy-five billion, eight hundred thirteen million, nine hundred twenty thousand, nine hundred forty-seven".