75778021732 has 12 divisors (see below), whose sum is σ = 151556043520. Its totient is φ = 32476295016.

The previous prime is 75778021633. The next prime is 75778021733. The reversal of 75778021732 is 23712087757.

75778021732 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (75778021733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353178932 + ... + 1353178987.

Almost surely, 2^75778021732 is an apocalyptic number.

It is an amenable number.

75778021732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75778021732 is a wasteful number, since it uses less digits than its factorization.

75778021732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706357930 (or 2706357928 counting only the distinct ones).

The product of its (nonzero) digits is 1152480, while the sum is 49.

The spelling of 75778021732 in words is "seventy-five billion, seven hundred seventy-eight million, twenty-one thousand, seven hundred thirty-two".