78333807840 has 96 divisors (see below), whose sum is σ = 247594094496. Its totient is φ = 20817684480.

The previous prime is 78333807809. The next prime is 78333807841. The reversal of 78333807840 is 4870833387.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×78333807840² (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 (78333807841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137851 + ... + 419130.

It is an arithmetic number, because the mean of its divisors is an integer number (2579105151).

Almost surely, 2^78333807840 is an apocalyptic number.

It is an amenable number.

78333807840 is an abundant number, since it is smaller than the sum of its proper divisors (169260286656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78333807840 is a wasteful number, since it uses less digits than its factorization.

78333807840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557292 (or 557284 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 78333807840 in words is "seventy-eight billion, three hundred thirty-three million, eight hundred seven thousand, eight hundred forty".