64724212501457 has 4 divisors (see below), whose sum is σ = 65451450844260. Its totient is φ = 63996974158656.

The previous prime is 64724212501447. The next prime is 64724212501471. The reversal of 64724212501457 is 75410521242746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31527820721296 + 33196391780161 = 5614964^2 + 5761631^2 .

It is a cyclic number.

It is not a de Polignac number, because 64724212501457 - 2⁴ = 64724212501441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64724212501447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363619171268 + ... + 363619171445.

It is an arithmetic number, because the mean of its divisors is an integer number (16362862711065).

Almost surely, 2^{64724212501457} is an apocalyptic number.

It is an amenable number.

64724212501457 is a deficient number, since it is larger than the sum of its proper divisors (727238342803).

64724212501457 is an equidigital number, since it uses as much as digits as its factorization.

64724212501457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727238342802.

The product of its (nonzero) digits is 3763200, while the sum is 50.

The spelling of 64724212501457 in words is "sixty-four trillion, seven hundred twenty-four billion, two hundred twelve million, five hundred one thousand, four hundred fifty-seven".