361812862261 has 4 divisors (see below), whose sum is σ = 361826028000. Its totient is φ = 361799696524.

The previous prime is 361812862249. The next prime is 361812862291. The reversal of 361812862261 is 162268218163.

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: 162268218163 = 593 ⋅273639491.

It is a cyclic number.

It is not a de Polignac number, because 361812862261 - 2⁹ = 361812861749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361812862211) 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, 6541561 + ... + 6596638.

It is an arithmetic number, because the mean of its divisors is an integer number (90456507000).

Almost surely, 2^361812862261 is an apocalyptic number.

It is an amenable number.

361812862261 is a deficient number, since it is larger than the sum of its proper divisors (13165739).

361812862261 is a wasteful number, since it uses less digits than its factorization.

361812862261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13165738.

The product of its digits is 331776, while the sum is 46.

The spelling of 361812862261 in words is "three hundred sixty-one billion, eight hundred twelve million, eight hundred sixty-two thousand, two hundred sixty-one".