68615100 has 180 divisors, whose sum is σ = 228750984. Its totient is φ = 17781120.

The previous prime is 68615089. The next prime is 68615101. The reversal of 68615100 is 151686.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68615101) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 348202 + ... + 348398.

Almost surely, 2^68615100 is an apocalyptic number.

68615100 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 68615100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114375492).

68615100 is an abundant number, since it is smaller than the sum of its proper divisors (160135884).

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

68615100 is a wasteful number, since it uses less digits than its factorization.

68615100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 68615100 is about 8283.4232054145. The cubic root of 68615100 is about 409.3925169747.

Adding to 68615100 its reverse (151686), we get a palindrome (68766786).

The spelling of 68615100 in words is "sixty-eight million, six hundred fifteen thousand, one hundred".