1361638364 has 24 divisors (see below), whose sum is σ = 2491657728. Its totient is φ = 649859760.

The previous prime is 1361638357. The next prime is 1361638393. The reversal of 1361638364 is 4638361631.

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, 29609 + ... + 59999.

It is an arithmetic number, because the mean of its divisors is an integer number (103819072).

Almost surely, 2^1361638364 is an apocalyptic number.

It is an amenable number.

1361638364 is a deficient number, since it is larger than the sum of its proper divisors (1130019364).

1361638364 is a wasteful number, since it uses less digits than its factorization.

1361638364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30905 (or 30903 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 1361638364 is about 36900.3843340418. The cubic root of 1361638364 is about 1108.3763736328.

Adding to 1361638364 its reverse (4638361631), we get a palindrome (5999999995).

The spelling of 1361638364 in words is "one billion, three hundred sixty-one million, six hundred thirty-eight thousand, three hundred sixty-four".