78853053615889 has 24 divisors (see below), whose sum is σ = 94911037332840. Its totient is φ = 65243247100416.

The previous prime is 78853053615871. The next prime is 78853053615901. The reversal of 78853053615889 is 98851635035887.

It can be written as a sum of positive squares in 4 ways, for example, as 5112912380625 + 73740141235264 = 2261175^2 + 8587208^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78853053615889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78853053615829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276169 + ... + 12561145.

It is an arithmetic number, because the mean of its divisors is an integer number (3954626555535).

Almost surely, 2^{78853053615889} is an apocalyptic number.

It is an amenable number.

78853053615889 is a deficient number, since it is larger than the sum of its proper divisors (16057983716951).

78853053615889 is a wasteful number, since it uses less digits than its factorization.

78853053615889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12289537 (or 12289530 counting only the distinct ones).

The product of its (nonzero) digits is 1741824000, while the sum is 76.

The spelling of 78853053615889 in words is "seventy-eight trillion, eight hundred fifty-three billion, fifty-three million, six hundred fifteen thousand, eight hundred eighty-nine".