1661862336 has 56 divisors (see below), whose sum is σ = 4655667600. Its totient is φ = 521367552.

The previous prime is 1661862283. The next prime is 1661862343. The reversal of 1661862336 is 6332681661.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

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, 251311 + ... + 257838.

Almost surely, 2^1661862336 is an apocalyptic number.

1661862336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1661862336 is an abundant number, since it is smaller than the sum of its proper divisors (2993805264).

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

1661862336 is a wasteful number, since it uses less digits than its factorization.

1661862336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509181 (or 509171 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 1661862336 is about 40765.9457881208. The cubic root of 1661862336 is about 1184.4907723180.

The spelling of 1661862336 in words is "one billion, six hundred sixty-one million, eight hundred sixty-two thousand, three hundred thirty-six".