68645514240 has 528 divisors, whose sum is σ = 244480579200. Its totient is φ = 17804427264.

The previous prime is 68645514227. The next prime is 68645514277. The reversal of 68645514240 is 4241554686.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 396794794 + ... + 396794966.

It is an arithmetic number, because the mean of its divisors is an integer number (463031400).

Almost surely, 2^68645514240 is an apocalyptic number.

68645514240 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 68645514240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122240289600).

68645514240 is an abundant number, since it is smaller than the sum of its proper divisors (175835064960).

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

68645514240 is a wasteful number, since it uses less digits than its factorization.

68645514240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 68645514240 in words is "sixty-eight billion, six hundred forty-five million, five hundred fourteen thousand, two hundred forty".