1618149312 has 210 divisors, whose sum is σ = 5196873528. Its totient is φ = 497622528.

The previous prime is 1618149293. The next prime is 1618149329. The reversal of 1618149312 is 2139418161.

1618149312 is a `hidden beast` number, since 1 + 618 + 1 + 4 + 9 + 31 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 875173 + ... + 877019.

Almost surely, 2^1618149312 is an apocalyptic number.

1618149312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618149312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2598436764).

1618149312 is an abundant number, since it is smaller than the sum of its proper divisors (3578724216).

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

1618149312 is a wasteful number, since it uses less digits than its factorization.

1618149312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897 (or 1865 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1618149312 is about 40226.2266686797. The cubic root of 1618149312 is about 1174.0128874563.

The spelling of 1618149312 in words is "one billion, six hundred eighteen million, one hundred forty-nine thousand, three hundred twelve".