78286197545 has 16 divisors (see below), whose sum is σ = 95363101440. Its totient is φ = 61684907904.

The previous prime is 78286197499. The next prime is 78286197569. The reversal of 78286197545 is 54579168287.

It is a cyclic number.

It is not a de Polignac number, because 78286197545 - 2¹⁶ = 78286132009 is a prime.

It is a super-2 number, since 2×78286197545² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113282 + ... + 411588.

It is an arithmetic number, because the mean of its divisors is an integer number (5960193840).

Almost surely, 2^78286197545 is an apocalyptic number.

It is an amenable number.

78286197545 is a deficient number, since it is larger than the sum of its proper divisors (17076903895).

78286197545 is a wasteful number, since it uses less digits than its factorization.

78286197545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299104.

The product of its digits is 33868800, while the sum is 62.

The spelling of 78286197545 in words is "seventy-eight billion, two hundred eighty-six million, one hundred ninety-seven thousand, five hundred forty-five".