78291228425733 has 16 divisors (see below), whose sum is σ = 117718154407360. Its totient is φ = 51415135084368.

The previous prime is 78291228425701. The next prime is 78291228425777. The reversal of 78291228425733 is 33752482219287.

It is a happy number.

78291228425733 is a `hidden beast` number, since 7 + 8 + 2 + 9 + 12 + 2 + 8 + 42 + 573 + 3 = 666.

It is not a de Polignac number, because 78291228425733 - 2⁵ = 78291228425701 is a prime.

It is a super-2 number, since 2×78291228425733² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78291228425833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21639364810 + ... + 21639368427.

It is an arithmetic number, because the mean of its divisors is an integer number (7357384650460).

Almost surely, 2^{78291228425733} is an apocalyptic number.

It is an amenable number.

78291228425733 is a deficient number, since it is larger than the sum of its proper divisors (39426925981627).

78291228425733 is a wasteful number, since it uses less digits than its factorization.

78291228425733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43278733313 (or 43278733307 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 78291228425733 in words is "seventy-eight trillion, two hundred ninety-one billion, two hundred twenty-eight million, four hundred twenty-five thousand, seven hundred thirty-three".