361261855 has 4 divisors (see below), whose sum is σ = 433514232. Its totient is φ = 289009480.

The previous prime is 361261847. The next prime is 361261909. The reversal of 361261855 is 558162163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558162163 = 13 ⋅42935551.

It is not a de Polignac number, because 361261855 - 2³ = 361261847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36126181 + ... + 36126190.

It is an arithmetic number, because the mean of its divisors is an integer number (108378558).

Almost surely, 2^361261855 is an apocalyptic number.

361261855 is a deficient number, since it is larger than the sum of its proper divisors (72252377).

361261855 is an equidigital number, since it uses as much as digits as its factorization.

361261855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72252376.

The product of its digits is 43200, while the sum is 37.

The square root of 361261855 is about 19006.8896719058. The cubic root of 361261855 is about 712.2088552959.

The spelling of 361261855 in words is "three hundred sixty-one million, two hundred sixty-one thousand, eight hundred fifty-five".