78298254772 has 6 divisors (see below), whose sum is σ = 137021945858. Its totient is φ = 39149127384.

The previous prime is 78298254709. The next prime is 78298254787. The reversal of 78298254772 is 27745289287.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 73764387216 + 4533867556 = 271596^2 + 67334^2 .

It is a super-2 number, since 2×78298254772² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78298254772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9787281843 + ... + 9787281850.

Almost surely, 2^78298254772 is an apocalyptic number.

It is an amenable number.

78298254772 is a deficient number, since it is larger than the sum of its proper divisors (58723691086).

78298254772 is a wasteful number, since it uses less digits than its factorization.

78298254772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19574563697 (or 19574563695 counting only the distinct ones).

The product of its digits is 31610880, while the sum is 61.

The spelling of 78298254772 in words is "seventy-eight billion, two hundred ninety-eight million, two hundred fifty-four thousand, seven hundred seventy-two".