64129854 has 24 divisors (see below), whose sum is σ = 130257288. Its totient is φ = 21048720.

The previous prime is 64129853. The next prime is 64129861. The reversal of 64129854 is 45892146.

It is a super-2 number, since 2×64129854² = 8225276348122632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64129853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25744 + ... + 28124.

It is an arithmetic number, because the mean of its divisors is an integer number (5427387).

Almost surely, 2^64129854 is an apocalyptic number.

64129854 is an abundant number, since it is smaller than the sum of its proper divisors (66127434).

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

64129854 is a wasteful number, since it uses less digits than its factorization.

64129854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520 (or 2453 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 64129854 is about 8008.1117624569. Note that the first 3 decimals coincide. The cubic root of 64129854 is about 400.2703464076.

The spelling of 64129854 in words is "sixty-four million, one hundred twenty-nine thousand, eight hundred fifty-four".