78545757284 has 6 divisors (see below), whose sum is σ = 137455075254. Its totient is φ = 39272878640.

The previous prime is 78545757259. The next prime is 78545757287. The reversal of 78545757284 is 48275754587.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72387902500 + 6157854784 = 269050^2 + 78472^2 .

It is not an unprimeable number, because it can be changed into a prime (78545757287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9818219657 + ... + 9818219664.

It is an arithmetic number, because the mean of its divisors is an integer number (22909179209).

Almost surely, 2^78545757284 is an apocalyptic number.

It is an amenable number.

78545757284 is a deficient number, since it is larger than the sum of its proper divisors (58909317970).

78545757284 is a wasteful number, since it uses less digits than its factorization.

78545757284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19636439325 (or 19636439323 counting only the distinct ones).

The product of its digits is 87808000, while the sum is 62.

The spelling of 78545757284 in words is "seventy-eight billion, five hundred forty-five million, seven hundred fifty-seven thousand, two hundred eighty-four".