361721191396968 has 144 divisors (see below), whose sum is σ = 1062096619603500. Its totient is φ = 111164568293376.

The previous prime is 361721191396967. The next prime is 361721191396987. The reversal of 361721191396968 is 869693191127163.

It is a happy number.

361721191396968 is a `hidden beast` number, since 3 + 6 + 17 + 211 + 9 + 1 + 396 + 9 + 6 + 8 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 192030915980484 + 169690275416484 = 13857522^2 + 13026522^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 361721191396896 and 361721191396905.

It is not an unprimeable number, because it can be changed into a prime (361721191396963) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7842313 + ... + 28016856.

Almost surely, 2^{361721191396968} is an apocalyptic number.

It is an amenable number.

361721191396968 is an abundant number, since it is smaller than the sum of its proper divisors (700375428206532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

361721191396968 is a wasteful number, since it uses less digits than its factorization.

361721191396968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35860036 (or 35860016 counting only the distinct ones).

The product of its digits is 158723712, while the sum is 72.

The spelling of 361721191396968 in words is "three hundred sixty-one trillion, seven hundred twenty-one billion, one hundred ninety-one million, three hundred ninety-six thousand, nine hundred sixty-eight".