78285745798 has 16 divisors (see below), whose sum is σ = 128242741536. Its totient is φ = 35622982080.

The previous prime is 78285745781. The next prime is 78285745799. The reversal of 78285745798 is 89754758287.

It is a happy number.

It is a super-2 number, since 2×78285745798² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78285745799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21202311 + ... + 21206002.

It is an arithmetic number, because the mean of its divisors is an integer number (8015171346).

Almost surely, 2^78285745798 is an apocalyptic number.

78285745798 is a deficient number, since it is larger than the sum of its proper divisors (49956995738).

78285745798 is a wasteful number, since it uses less digits than its factorization.

78285745798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42408399.

The product of its digits is 316108800, while the sum is 70.

The spelling of 78285745798 in words is "seventy-eight billion, two hundred eighty-five million, seven hundred forty-five thousand, seven hundred ninety-eight".