64772406247 has 8 divisors (see below), whose sum is σ = 69767096960. Its totient is φ = 59936277240.

The previous prime is 64772406233. The next prime is 64772406287. The reversal of 64772406247 is 74260427746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64772406247 is a prime.

It is a super-2 number, since 2×64772406247² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64772406247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64772406217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39639579 + ... + 39641212.

It is an arithmetic number, because the mean of its divisors is an integer number (8720887120).

Almost surely, 2^64772406247 is an apocalyptic number.

64772406247 is a deficient number, since it is larger than the sum of its proper divisors (4994690713).

64772406247 is a wasteful number, since it uses less digits than its factorization.

64772406247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79280853.

The product of its (nonzero) digits is 3161088, while the sum is 49.

The spelling of 64772406247 in words is "sixty-four billion, seven hundred seventy-two million, four hundred six thousand, two hundred forty-seven".