78058180781 has 16 divisors (see below), whose sum is σ = 98563785984. Its totient is φ = 60233420544.

The previous prime is 78058180771. The next prime is 78058180799. The reversal of 78058180781 is 18708185087.

It is a cyclic number.

It is not a de Polignac number, because 78058180781 - 2¹⁸ = 78057918637 is a prime.

It is a super-2 number, since 2×78058180781² (a number of 23 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 (78058180771) 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, 14257070 + ... + 14262543.

It is an arithmetic number, because the mean of its divisors is an integer number (6160236624).

Almost surely, 2^78058180781 is an apocalyptic number.

It is an amenable number.

78058180781 is a deficient number, since it is larger than the sum of its proper divisors (20505605203).

78058180781 is a wasteful number, since it uses less digits than its factorization.

78058180781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28519660.

The product of its (nonzero) digits is 1003520, while the sum is 53.

The spelling of 78058180781 in words is "seventy-eight billion, fifty-eight million, one hundred eighty thousand, seven hundred eighty-one".