78347047564 has 24 divisors (see below), whose sum is σ = 140858214560. Its totient is φ = 38102524416.

The previous prime is 78347047549. The next prime is 78347047589. The reversal of 78347047564 is 46574074387.

It is a happy number.

It is a super-2 number, since 2×78347047564² (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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385489 + ... + 552535.

Almost surely, 2^78347047564 is an apocalyptic number.

78347047564 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

78347047564 is a deficient number, since it is larger than the sum of its proper divisors (62511166996).

78347047564 is a wasteful number, since it uses less digits than its factorization.

78347047564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170257 (or 170255 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 55.

The spelling of 78347047564 in words is "seventy-eight billion, three hundred forty-seven million, forty-seven thousand, five hundred sixty-four".