64994830542 has 64 divisors (see below), whose sum is σ = 153257495040. Its totient is φ = 20346738048.

The previous prime is 64994830519. The next prime is 64994830543. The reversal of 64994830542 is 24503849946.

64994830542 is a `hidden beast` number, since 6 + 4 + 9 + 94 + 8 + 3 + 0 + 542 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64994830543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 352903 + ... + 504509.

It is an arithmetic number, because the mean of its divisors is an integer number (2394648360).

Almost surely, 2^64994830542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64994830542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76628747520).

64994830542 is an abundant number, since it is smaller than the sum of its proper divisors (88262664498).

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

64994830542 is a wasteful number, since it uses less digits than its factorization.

64994830542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152102 (or 152096 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 64994830542 in words is "sixty-four billion, nine hundred ninety-four million, eight hundred thirty thousand, five hundred forty-two".