73669517728 has 12 divisors (see below), whose sum is σ = 145036863090. Its totient is φ = 36834758848.

The previous prime is 73669517717. The next prime is 73669517737. The reversal of 73669517728 is 82771596637.

It can be written as a sum of positive squares in only one way, i.e., 65480715664 + 8188802064 = 255892^2 + 90492^2 .

It is a super-2 number, since 2×73669517728² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1151086183 + ... + 1151086246.

Almost surely, 2^73669517728 is an apocalyptic number.

It is an amenable number.

73669517728 is a deficient number, since it is larger than the sum of its proper divisors (71367345362).

73669517728 is a wasteful number, since it uses less digits than its factorization.

73669517728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302172439 (or 2302172431 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 61.

The spelling of 73669517728 in words is "seventy-three billion, six hundred sixty-nine million, five hundred seventeen thousand, seven hundred twenty-eight".