1557900650 has 12 divisors (see below), whose sum is σ = 2897695302. Its totient is φ = 623160240.

The previous prime is 1557900623. The next prime is 1557900671. The reversal of 1557900650 is 560097551.

It can be written as a sum of positive squares in 3 ways, for example, as 1326343561 + 231557089 = 36419^2 + 15217^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15578957 + ... + 15579056.

Almost surely, 2^1557900650 is an apocalyptic number.

1557900650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1557900650 is a deficient number, since it is larger than the sum of its proper divisors (1339794652).

1557900650 is a wasteful number, since it uses less digits than its factorization.

1557900650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31158025 (or 31158020 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 38.

The square root of 1557900650 is about 39470.2501892248. The cubic root of 1557900650 is about 1159.2575138563.

The spelling of 1557900650 in words is "one billion, five hundred fifty-seven million, nine hundred thousand, six hundred fifty".