78206780757 has 8 divisors (see below), whose sum is σ = 119172237376. Its totient is φ = 44689588992.

The previous prime is 78206780741. The next prime is 78206780759. The reversal of 78206780757 is 75708760287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78206780757 - 2⁴ = 78206780741 is a prime.

It is a super-2 number, since 2×78206780757² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78206780697 and 78206780706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78206780759) 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 7 ways as a sum of consecutive naturals, for example, 1862066188 + ... + 1862066229.

It is an arithmetic number, because the mean of its divisors is an integer number (14896529672).

Almost surely, 2^78206780757 is an apocalyptic number.

It is an amenable number.

78206780757 is a deficient number, since it is larger than the sum of its proper divisors (40965456619).

78206780757 is a wasteful number, since it uses less digits than its factorization.

78206780757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3724132427.

The product of its (nonzero) digits is 9219840, while the sum is 57.

The spelling of 78206780757 in words is "seventy-eight billion, two hundred six million, seven hundred eighty thousand, seven hundred fifty-seven".