724123561161 has 96 divisors (see below), whose sum is σ = 1306843955200. Its totient is φ = 347048634240.

The previous prime is 724123561157. The next prime is 724123561169. The reversal of 724123561161 is 161165321427.

It is not a de Polignac number, because 724123561161 - 2² = 724123561157 is a prime.

It is a super-3 number, since 3×724123561161³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (724123561169) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 78713040 + ... + 78722238.

Almost surely, 2^724123561161 is an apocalyptic number.

It is an amenable number.

724123561161 is a deficient number, since it is larger than the sum of its proper divisors (582720394039).

724123561161 is a wasteful number, since it uses less digits than its factorization.

724123561161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11627 (or 11616 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

Adding to 724123561161 its reverse (161165321427), we get a palindrome (885288882588).

The spelling of 724123561161 in words is "seven hundred twenty-four billion, one hundred twenty-three million, five hundred sixty-one thousand, one hundred sixty-one".