73181897332 has 6 divisors (see below), whose sum is σ = 128068320338. Its totient is φ = 36590948664.

The previous prime is 73181897311. The next prime is 73181897429. The reversal of 73181897332 is 23379818137.

It can be written as a sum of positive squares in only one way, i.e., 72897840016 + 284057316 = 269996^2 + 16854^2 .

It is a super-2 number, since 2×73181897332² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73181897332.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9147737163 + ... + 9147737170.

Almost surely, 2^73181897332 is an apocalyptic number.

It is an amenable number.

73181897332 is a deficient number, since it is larger than the sum of its proper divisors (54886423006).

73181897332 is a wasteful number, since it uses less digits than its factorization.

73181897332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18295474337 (or 18295474335 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The spelling of 73181897332 in words is "seventy-three billion, one hundred eighty-one million, eight hundred ninety-seven thousand, three hundred thirty-two".