78384757552 has 10 divisors (see below), whose sum is σ = 151870467788. Its totient is φ = 39192378768.

The previous prime is 78384757543. The next prime is 78384757571. The reversal of 78384757552 is 25575748387.

It is a happy number.

It is a super-2 number, since 2×78384757552² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2449523658 + ... + 2449523689.

Almost surely, 2^78384757552 is an apocalyptic number.

It is an amenable number.

78384757552 is a deficient number, since it is larger than the sum of its proper divisors (73485710236).

78384757552 is a wasteful number, since it uses less digits than its factorization.

78384757552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899047355 (or 4899047349 counting only the distinct ones).

The product of its digits is 65856000, while the sum is 61.

The spelling of 78384757552 in words is "seventy-eight billion, three hundred eighty-four million, seven hundred fifty-seven thousand, five hundred fifty-two".