1361557650 has 48 divisors (see below), whose sum is σ = 3382578144. Its totient is φ = 362446080.

The previous prime is 1361557619. The next prime is 1361557663. The reversal of 1361557650 is 567551631.

It is a junction number, because it is equal to n+sod(n) for n = 1361557599 and 1361557608.

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, 81297 + ... + 96603.

It is an arithmetic number, because the mean of its divisors is an integer number (70470378).

Almost surely, 2^1361557650 is an apocalyptic number.

1361557650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1361557650 is an abundant number, since it is smaller than the sum of its proper divisors (2021020494).

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

1361557650 is a wasteful number, since it uses less digits than its factorization.

1361557650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15915 (or 15910 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 1361557650 is about 36899.2906435883. The cubic root of 1361557650 is about 1108.3544727471.

The spelling of 1361557650 in words is "one billion, three hundred sixty-one million, five hundred fifty-seven thousand, six hundred fifty".