63400428745 has 16 divisors (see below), whose sum is σ = 80730630288. Its totient is φ = 47633213440.

The previous prime is 63400428713. The next prime is 63400428757. The reversal of 63400428745 is 54782400436.

It can be written as a sum of positive squares in 8 ways, for example, as 4957849744 + 58442579001 = 70412^2 + 241749^2 .

It is not a de Polignac number, because 63400428745 - 2⁵ = 63400428713 is a prime.

It is a super-2 number, since 2×63400428745² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 769804 + ... + 848173.

It is an arithmetic number, because the mean of its divisors is an integer number (5045664393).

Almost surely, 2^63400428745 is an apocalyptic number.

It is an amenable number.

63400428745 is a deficient number, since it is larger than the sum of its proper divisors (17330201543).

63400428745 is a wasteful number, since it uses less digits than its factorization.

63400428745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618460.

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 63400428745 in words is "sixty-three billion, four hundred million, four hundred twenty-eight thousand, seven hundred forty-five".