615780366240 has 768 divisors, whose sum is σ = 2284924723200. Its totient is φ = 138087825408.

The previous prime is 615780366167. The next prime is 615780366247. The reversal of 615780366240 is 42663087516.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 615780366240.

It is not an unprimeable number, because it can be changed into a prime (615780366247) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 328765944 + ... + 328767816.

It is an arithmetic number, because the mean of its divisors is an integer number (2975162400).

Almost surely, 2^615780366240 is an apocalyptic number.

615780366240 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 615780366240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142462361600).

615780366240 is an abundant number, since it is smaller than the sum of its proper divisors (1669144356960).

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

615780366240 is a wasteful number, since it uses less digits than its factorization.

615780366240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 615780366240 in words is "six hundred fifteen billion, seven hundred eighty million, three hundred sixty-six thousand, two hundred forty".