64253401663730 has 8 divisors (see below), whose sum is σ = 115656122994732. Its totient is φ = 25701360665488.

The previous prime is 64253401663679. The next prime is 64253401663733. The reversal of 64253401663730 is 3736610435246.

It can be written as a sum of positive squares in 2 ways, for example, as 59284902709561 + 4968498954169 = 7699669^2 + 2229013^2 .

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

It is a super-2 number, since 2×64253401663730² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64253401663733) 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, 3212670083177 + ... + 3212670083196.

Almost surely, 2^{64253401663730} is an apocalyptic number.

64253401663730 is a deficient number, since it is larger than the sum of its proper divisors (51402721331002).

64253401663730 is a wasteful number, since it uses less digits than its factorization.

64253401663730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425340166380.

The product of its (nonzero) digits is 6531840, while the sum is 50.

The spelling of 64253401663730 in words is "sixty-four trillion, two hundred fifty-three billion, four hundred one million, six hundred sixty-three thousand, seven hundred thirty".