64472171357 has 16 divisors (see below), whose sum is σ = 70976381760. Its totient is φ = 58075449600.

The previous prime is 64472171347. The next prime is 64472171371. The reversal of 64472171357 is 75317127446.

It is a cyclic number.

It is not a de Polignac number, because 64472171357 - 2¹⁴ = 64472154973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64472171347) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6534494 + ... + 6544352.

It is an arithmetic number, because the mean of its divisors is an integer number (4436023860).

Almost surely, 2^64472171357 is an apocalyptic number.

It is an amenable number.

64472171357 is a deficient number, since it is larger than the sum of its proper divisors (6504210403).

64472171357 is a wasteful number, since it uses less digits than its factorization.

64472171357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15244.

The product of its digits is 987840, while the sum is 47.

The spelling of 64472171357 in words is "sixty-four billion, four hundred seventy-two million, one hundred seventy-one thousand, three hundred fifty-seven".