73011531161 has 4 divisors (see below), whose sum is σ = 74249014800. Its totient is φ = 71774047524.

The previous prime is 73011531137. The next prime is 73011531193. The reversal of 73011531161 is 16113511037.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73011531161 is a prime.

It is a super-3 number, since 3×73011531161³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73011531661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618741731 + ... + 618741848.

It is an arithmetic number, because the mean of its divisors is an integer number (18562253700).

Almost surely, 2^73011531161 is an apocalyptic number.

It is an amenable number.

73011531161 is a deficient number, since it is larger than the sum of its proper divisors (1237483639).

73011531161 is a wasteful number, since it uses less digits than its factorization.

73011531161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237483638.

The product of its (nonzero) digits is 1890, while the sum is 29.

The spelling of 73011531161 in words is "seventy-three billion, eleven million, five hundred thirty-one thousand, one hundred sixty-one".