64546978932 has 36 divisors (see below), whose sum is σ = 163539020736. Its totient is φ = 21465734160.

The previous prime is 64546978927. The next prime is 64546978957. The reversal of 64546978932 is 23987964546.

64546978932 is a `hidden beast` number, since 6 + 4 + 546 + 9 + 7 + 89 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64546978932.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2064498 + ... + 2095529.

It is an arithmetic number, because the mean of its divisors is an integer number (4542750576).

Almost surely, 2^64546978932 is an apocalyptic number.

It is an amenable number.

64546978932 is an abundant number, since it is smaller than the sum of its proper divisors (98992041804).

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

64546978932 is a wasteful number, since it uses less digits than its factorization.

64546978932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160468 (or 4160463 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 64546978932 in words is "sixty-four billion, five hundred forty-six million, nine hundred seventy-eight thousand, nine hundred thirty-two".