73692961649 has 4 divisors (see below), whose sum is σ = 78027841764. Its totient is φ = 69358081536.

The previous prime is 73692961637. The next prime is 73692961673. The reversal of 73692961649 is 94616929637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94616929637 = 4597 ⋅20582321.

It can be written as a sum of positive squares in 2 ways, for example, as 37068571024 + 36624390625 = 192532^2 + 191375^2 .

It is a cyclic number.

It is not a de Polignac number, because 73692961649 - 2⁴ = 73692961633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73692961591 and 73692961600.

It is not an unprimeable number, because it can be changed into a prime (73692961049) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2167440032 + ... + 2167440065.

It is an arithmetic number, because the mean of its divisors is an integer number (19506960441).

Almost surely, 2^73692961649 is an apocalyptic number.

It is an amenable number.

73692961649 is a deficient number, since it is larger than the sum of its proper divisors (4334880115).

73692961649 is a wasteful number, since it uses less digits than its factorization.

73692961649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334880114.

The product of its digits is 26453952, while the sum is 62.

The spelling of 73692961649 in words is "seventy-three billion, six hundred ninety-two million, nine hundred sixty-one thousand, six hundred forty-nine".