73620818647 has 4 divisors (see below), whose sum is σ = 77951455056. Its totient is φ = 69290182240.

The previous prime is 73620818629. The next prime is 73620818759. The reversal of 73620818647 is 74681802637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74681802637 = 13 ⋅5744754049.

It is a cyclic number.

It is not a de Polignac number, because 73620818647 - 2²³ = 73612430039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73620818594 and 73620818603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73620818617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2165318179 + ... + 2165318212.

It is an arithmetic number, because the mean of its divisors is an integer number (19487863764).

Almost surely, 2^73620818647 is an apocalyptic number.

73620818647 is a deficient number, since it is larger than the sum of its proper divisors (4330636409).

73620818647 is a wasteful number, since it uses less digits than its factorization.

73620818647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330636408.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 73620818647 in words is "seventy-three billion, six hundred twenty million, eight hundred eighteen thousand, six hundred forty-seven".