78668045253 has 12 divisors (see below), whose sum is σ = 129864709728. Its totient is φ = 44953168680.

The previous prime is 78668045221. The next prime is 78668045297. The reversal of 78668045253 is 35254086687.

78668045253 is a `hidden beast` number, since 7 + 8 + 66 + 80 + 452 + 53 = 666.

It is not a de Polignac number, because 78668045253 - 2⁵ = 78668045221 is a prime.

It is a super-2 number, since 2×78668045253² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78668045253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78668045453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 624349503 + ... + 624349628.

It is an arithmetic number, because the mean of its divisors is an integer number (10822059144).

Almost surely, 2^78668045253 is an apocalyptic number.

It is an amenable number.

78668045253 is a deficient number, since it is larger than the sum of its proper divisors (51196664475).

78668045253 is a wasteful number, since it uses less digits than its factorization.

78668045253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248699144 (or 1248699141 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 78668045253 in words is "seventy-eight billion, six hundred sixty-eight million, forty-five thousand, two hundred fifty-three".