78298390601 has 4 divisors (see below), whose sum is σ = 78298990212. Its totient is φ = 78297790992.

The previous prime is 78298390571. The next prime is 78298390649. The reversal of 78298390601 is 10609389287.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 22089093376 + 56209297225 = 148624^2 + 237085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78298390601 is a prime.

It is a super-2 number, since 2×78298390601² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78298390801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11546 + ... + 395891.

It is an arithmetic number, because the mean of its divisors is an integer number (19574747553).

Almost surely, 2^78298390601 is an apocalyptic number.

It is an amenable number.

78298390601 is a deficient number, since it is larger than the sum of its proper divisors (599611).

78298390601 is a wasteful number, since it uses less digits than its factorization.

78298390601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599610.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 78298390601 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, six hundred one".