68558192640 has 952 divisors, whose sum is σ = 288813375648. Its totient is φ = 15288238080.

The previous prime is 68558192629. The next prime is 68558192641. The reversal of 68558192640 is 4629185586.

68558192640 is a `hidden beast` number, since 68 + 558 + 1 + 9 + 26 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (68558192641) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1672151020 + ... + 1672151060.

Almost surely, 2^68558192640 is an apocalyptic number.

68558192640 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 68558192640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144406687824).

68558192640 is an abundant number, since it is smaller than the sum of its proper divisors (220255183008).

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

68558192640 is an frugal number, since it uses more digits than its factorization.

68558192640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 68558192640 in words is "sixty-eight billion, five hundred fifty-eight million, one hundred ninety-two thousand, six hundred forty".