1361261610 has 48 divisors (see below), whose sum is σ = 3566328480. Its totient is φ = 360228960.

The previous prime is 1361261609. The next prime is 1361261641. The reversal of 1361261610 is 161621631.

1361261610 is a `hidden beast` number, since 1 + 36 + 1 + 2 + 616 + 10 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45940 + ... + 69519.

It is an arithmetic number, because the mean of its divisors is an integer number (74298510).

Almost surely, 2^1361261610 is an apocalyptic number.

1361261610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1361261610 is an abundant number, since it is smaller than the sum of its proper divisors (2205066870).

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

1361261610 is a wasteful number, since it uses less digits than its factorization.

1361261610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115603 (or 115600 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1361261610 is about 36895.2789662851. The cubic root of 1361261610 is about 1108.2741380311.

The spelling of 1361261610 in words is "one billion, three hundred sixty-one million, two hundred sixty-one thousand, six hundred ten".