78824581661061 has 24 divisors (see below), whose sum is σ = 116635359335040. Its totient is φ = 51267751368000.

The previous prime is 78824581661041. The next prime is 78824581661101. The reversal of 78824581661061 is 16016618542887.

It is a happy number.

78824581661061 is a `hidden beast` number, since 7 + 8 + 8 + 2 + 4 + 5 + 8 + 1 + 6 + 610 + 6 + 1 = 666.

It is not a de Polignac number, because 78824581661061 - 2²³ = 78824573272453 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78824581661061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78824581661041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89271586 + ... + 90150236.

It is an arithmetic number, because the mean of its divisors is an integer number (4859806638960).

Almost surely, 2^{78824581661061} is an apocalyptic number.

It is an amenable number.

78824581661061 is a deficient number, since it is larger than the sum of its proper divisors (37810777673979).

78824581661061 is a wasteful number, since it uses less digits than its factorization.

78824581661061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121817 (or 1121814 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 63.

The spelling of 78824581661061 in words is "seventy-eight trillion, eight hundred twenty-four billion, five hundred eighty-one million, six hundred sixty-one thousand, sixty-one".