64248820947 has 12 divisors (see below), whose sum is σ = 95185389720. Its totient is φ = 42831669240.

The previous prime is 64248820943. The next prime is 64248820949. The reversal of 64248820947 is 74902884246.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

64248820947 is a `hidden beast` number, since 6 + 424 + 8 + 8 + 209 + 4 + 7 = 666.

It is not a de Polignac number, because 64248820947 - 2² = 64248820943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64248820893 and 64248820902.

It is not an unprimeable number, because it can be changed into a prime (64248820943) 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, 1292697 + ... + 1341477.

It is an arithmetic number, because the mean of its divisors is an integer number (7932115810).

Almost surely, 2^64248820947 is an apocalyptic number.

64248820947 is a deficient number, since it is larger than the sum of its proper divisors (30936568773).

64248820947 is an frugal number, since it uses more digits than its factorization.

64248820947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97571 (or 48784 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 64248820947 in words is "sixty-four billion, two hundred forty-eight million, eight hundred twenty thousand, nine hundred forty-seven".