64729451954 has 16 divisors (see below), whose sum is σ = 103471319808. Its totient is φ = 30298891392.

The previous prime is 64729451869. The next prime is 64729451981. The reversal of 64729451954 is 45915492746.

It is a self number, because there is not a number n which added to its sum of digits gives 64729451954.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14967647 + ... + 14971970.

It is an arithmetic number, because the mean of its divisors is an integer number (6466957488).

Almost surely, 2^64729451954 is an apocalyptic number.

64729451954 is a deficient number, since it is larger than the sum of its proper divisors (38741867854).

64729451954 is a wasteful number, since it uses less digits than its factorization.

64729451954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29939689.

The product of its digits is 10886400, while the sum is 56.

The spelling of 64729451954 in words is "sixty-four billion, seven hundred twenty-nine million, four hundred fifty-one thousand, nine hundred fifty-four".