72985758361 has 4 divisors (see below), whose sum is σ = 73909628800. Its totient is φ = 72061887924.

The previous prime is 72985758277. The next prime is 72985758379. The reversal of 72985758361 is 16385758927.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16385758927 = 71 ⋅230785337.

It is a cyclic number.

It is not a de Polignac number, because 72985758361 - 2²³ = 72977369753 is a prime.

It is a super-3 number, since 3×72985758361³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72985758361.

It is not an unprimeable number, because it can be changed into a prime (72985758161) 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, 461935101 + ... + 461935258.

It is an arithmetic number, because the mean of its divisors is an integer number (18477407200).

Almost surely, 2^72985758361 is an apocalyptic number.

It is an amenable number.

72985758361 is a deficient number, since it is larger than the sum of its proper divisors (923870439).

72985758361 is an equidigital number, since it uses as much as digits as its factorization.

72985758361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923870438.

The product of its digits is 25401600, while the sum is 61.

The spelling of 72985758361 in words is "seventy-two billion, nine hundred eighty-five million, seven hundred fifty-eight thousand, three hundred sixty-one".