361261566 has 16 divisors (see below), whose sum is σ = 802803600. Its totient is φ = 120420504.

The previous prime is 361261517. The next prime is 361261583. The reversal of 361261566 is 665162163.

361261566 is a `hidden beast` number, since 36 + 1 + 2 + 61 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 361261566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3344961 + ... + 3345068.

It is an arithmetic number, because the mean of its divisors is an integer number (50175225).

Almost surely, 2^361261566 is an apocalyptic number.

361261566 is an abundant number, since it is smaller than the sum of its proper divisors (441542034).

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

361261566 is a wasteful number, since it uses less digits than its factorization.

361261566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690040 (or 6690034 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 361261566 is about 19006.8820693979. The cubic root of 361261566 is about 712.2086653798.

The spelling of 361261566 in words is "three hundred sixty-one million, two hundred sixty-one thousand, five hundred sixty-six".