78373107356544 has 960 divisors, whose sum is σ = 314878689290880. Its totient is φ = 18790722662400.

The previous prime is 78373107356527. The next prime is 78373107356549. The reversal of 78373107356544 is 44565370137387.

78373107356544 is a `hidden beast` number, since 7 + 8 + 3 + 7 + 3 + 10 + 73 + 5 + 6 + 544 = 666.

It is a super-2 number, since 2×78373107356544² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78373107356549) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 134628339 + ... + 135209229.

It is an arithmetic number, because the mean of its divisors is an integer number (327998634678).

Almost surely, 2^{78373107356544} 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 78373107356544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157439344645440).

78373107356544 is an abundant number, since it is smaller than the sum of its proper divisors (236505581934336).

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

78373107356544 is a wasteful number, since it uses less digits than its factorization.

78373107356544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580961 (or 580927 counting only the distinct ones).

The product of its (nonzero) digits is 177811200, while the sum is 63.

The spelling of 78373107356544 in words is "seventy-eight trillion, three hundred seventy-three billion, one hundred seven million, three hundred fifty-six thousand, five hundred forty-four".