78202796544 has 240 divisors, whose sum is σ = 236909024352. Its totient is φ = 25750130688.

The previous prime is 78202796537. The next prime is 78202796549. The reversal of 78202796544 is 44569720287.

78202796544 is a `hidden beast` number, since 7 + 8 + 2 + 0 + 2 + 7 + 96 + 544 = 666.

It is a super-2 number, since 2×78202796544² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (78202796549) 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, 10322742 + ... + 10330314.

Almost surely, 2^78202796544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78202796544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118454512176).

78202796544 is an abundant number, since it is smaller than the sum of its proper divisors (158706227808).

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

78202796544 is an frugal number, since it uses more digits than its factorization.

78202796544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7689 (or 7661 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 78202796544 in words is "seventy-eight billion, two hundred two million, seven hundred ninety-six thousand, five hundred forty-four".