72686745778383 has 96 divisors (see below), whose sum is σ = 117961586563392. Its totient is φ = 42742038528000.

The previous prime is 72686745778343. The next prime is 72686745778393. The reversal of 72686745778383 is 38387754768627.

72686745778383 is a `hidden beast` number, since 7 + 2 + 6 + 8 + 6 + 7 + 4 + 577 + 8 + 38 + 3 = 666.

It is not a de Polignac number, because 72686745778383 - 2⁹ = 72686745777871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72686745778343) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7075507935 + ... + 7075518207.

It is an arithmetic number, because the mean of its divisors is an integer number (1228766526702).

Almost surely, 2^{72686745778383} is an apocalyptic number.

72686745778383 is a deficient number, since it is larger than the sum of its proper divisors (45274840785009).

72686745778383 is a wasteful number, since it uses less digits than its factorization.

72686745778383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15545 (or 15542 counting only the distinct ones).

The product of its digits is 15931883520, while the sum is 81.

The spelling of 72686745778383 in words is "seventy-two trillion, six hundred eighty-six billion, seven hundred forty-five million, seven hundred seventy-eight thousand, three hundred eighty-three".