618688943040 has 336 divisors, whose sum is σ = 2358762246144. Its totient is φ = 136852531200.

The previous prime is 618688943027. The next prime is 618688943053. The reversal of 618688943040 is 40349886816.

It is an interprime number because it is at equal distance from previous prime (618688943027) and next prime (618688943053).

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1246105 + ... + 1670375.

Almost surely, 2^618688943040 is an apocalyptic number.

618688943040 is a gapful number since it is divisible by the number (60) 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 618688943040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1179381123072).

618688943040 is an abundant number, since it is smaller than the sum of its proper divisors (1740073303104).

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

618688943040 is a wasteful number, since it uses less digits than its factorization.

618688943040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424336 (or 424319 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 618688943040 in words is "six hundred eighteen billion, six hundred eighty-eight million, nine hundred forty-three thousand, forty".