79623661442544 has 240 divisors, whose sum is σ = 236836890948000. Its totient is φ = 25611409336320.

The previous prime is 79623661442543. The next prime is 79623661442599. The reversal of 79623661442544 is 44524416632697.

79623661442544 is a `hidden beast` number, since 7 + 9 + 6 + 2 + 3 + 6 + 614 + 4 + 2 + 5 + 4 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79623661442543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 144613272 + ... + 145162824.

It is an arithmetic number, because the mean of its divisors is an integer number (986820378950).

Almost surely, 2^{79623661442544} 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 79623661442544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118418445474000).

79623661442544 is an abundant number, since it is smaller than the sum of its proper divisors (157213229505456).

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

79623661442544 is a wasteful number, since it uses less digits than its factorization.

79623661442544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549981 (or 549938 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 63.

The spelling of 79623661442544 in words is "seventy-nine trillion, six hundred twenty-three billion, six hundred sixty-one million, four hundred forty-two thousand, five hundred forty-four".