73661913693 has 24 divisors (see below), whose sum is σ = 107150022720. Its totient is φ = 48762302400.

The previous prime is 73661913691. The next prime is 73661913707. The reversal of 73661913693 is 39631916637.

73661913693 is a `hidden beast` number, since 7 + 3 + 6 + 619 + 13 + 6 + 9 + 3 = 666.

It is not a de Polignac number, because 73661913693 - 2¹ = 73661913691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73661913691) 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, 3676978 + ... + 3696956.

It is an arithmetic number, because the mean of its divisors is an integer number (4464584280).

Almost surely, 2^73661913693 is an apocalyptic number.

It is an amenable number.

73661913693 is a deficient number, since it is larger than the sum of its proper divisors (33488109027).

73661913693 is a wasteful number, since it uses less digits than its factorization.

73661913693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22849 (or 22846 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 54.

The spelling of 73661913693 in words is "seventy-three billion, six hundred sixty-one million, nine hundred thirteen thousand, six hundred ninety-three".