78018082546 has 4 divisors (see below), whose sum is σ = 117027123822. Its totient is φ = 39009041272.

The previous prime is 78018082523. The next prime is 78018082577. The reversal of 78018082546 is 64528081087.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63890145225 + 14127937321 = 252765^2 + 118861^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78018082546.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19504520635 + ... + 19504520638.

Almost surely, 2^78018082546 is an apocalyptic number.

78018082546 is a deficient number, since it is larger than the sum of its proper divisors (39009041276).

78018082546 is a wasteful number, since it uses less digits than its factorization.

78018082546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39009041275.

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 78018082546 in words is "seventy-eight billion, eighteen million, eighty-two thousand, five hundred forty-six".