1361633690 has 8 divisors (see below), whose sum is σ = 2450940660. Its totient is φ = 544653472.

The previous prime is 1361633687. The next prime is 1361633699. The reversal of 1361633690 is 963361631.

It can be written as a sum of positive squares in 2 ways, for example, as 1322558689 + 39075001 = 36367^2 + 6251^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1361633690² = 3708092611486032200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1361633699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68081675 + ... + 68081694.

Almost surely, 2^1361633690 is an apocalyptic number.

1361633690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1361633690 is a deficient number, since it is larger than the sum of its proper divisors (1089306970).

1361633690 is a wasteful number, since it uses less digits than its factorization.

1361633690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136163376.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 1361633690 is about 36900.3210013138. The cubic root of 1361633690 is about 1108.3751054162.

The spelling of 1361633690 in words is "one billion, three hundred sixty-one million, six hundred thirty-three thousand, six hundred ninety".