78447299040 has 384 divisors, whose sum is σ = 300765104640. Its totient is φ = 18938880000.

The previous prime is 78447299011. The next prime is 78447299057. The reversal of 78447299040 is 4099274487.

It is a happy number.

78447299040 is a `hidden beast` number, since 7 + 84 + 472 + 9 + 90 + 4 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11924232 + ... + 11930808.

It is an arithmetic number, because the mean of its divisors is an integer number (783242460).

Almost surely, 2^78447299040 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 78447299040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150382552320).

78447299040 is an abundant number, since it is smaller than the sum of its proper divisors (222317805600).

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

78447299040 is a wasteful number, since it uses less digits than its factorization.

78447299040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6863 (or 6849 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 78447299040 in words is "seventy-eight billion, four hundred forty-seven million, two hundred ninety-nine thousand, forty".