78603164640 has 1920 divisors, whose sum is σ = 382109156352. Its totient is φ = 14691041280.

The previous prime is 78603164611. The next prime is 78603164641. The reversal of 78603164640 is 4646130687.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78603164641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 947026039 + ... + 947026121.

Almost surely, 2^78603164640 is an apocalyptic number.

78603164640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78603164640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191054578176).

78603164640 is an abundant number, since it is smaller than the sum of its proper divisors (303505991712).

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

78603164640 is a wasteful number, since it uses less digits than its factorization.

78603164640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 78603164640 in words is "seventy-eight billion, six hundred three million, one hundred sixty-four thousand, six hundred forty".