68506464 has 96 divisors (see below), whose sum is σ = 205117920. Its totient is φ = 19832832.

The previous prime is 68506453. The next prime is 68506469. The reversal of 68506464 is 46460586.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68506469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19602 + ... + 22830.

It is an arithmetic number, because the mean of its divisors is an integer number (2136645).

Almost surely, 2^68506464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68506464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102558960).

68506464 is an abundant number, since it is smaller than the sum of its proper divisors (136611456).

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

68506464 is a wasteful number, since it uses less digits than its factorization.

68506464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272 (or 3264 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 68506464 is about 8276.8631739325. The cubic root of 68506464 is about 409.1763436740.

The spelling of 68506464 in words is "sixty-eight million, five hundred six thousand, four hundred sixty-four".