63420450015 has 24 divisors (see below), whose sum is σ = 109878748560. Its totient is φ = 31222374144.

The previous prime is 63420450013. The next prime is 63420450043. The reversal of 63420450015 is 51005402436.

It is not a de Polignac number, because 63420450015 - 2¹ = 63420450013 is a prime.

It is a super-2 number, since 2×63420450015² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63420450013) 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 23 ways as a sum of consecutive naturals, for example, 12506430 + ... + 12511499.

It is an arithmetic number, because the mean of its divisors is an integer number (4578281190).

Almost surely, 2^63420450015 is an apocalyptic number.

63420450015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

63420450015 is a deficient number, since it is larger than the sum of its proper divisors (46458298545).

63420450015 is a wasteful number, since it uses less digits than its factorization.

63420450015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25017963 (or 25017950 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 63420450015 in words is "sixty-three billion, four hundred twenty million, four hundred fifty thousand, fifteen".