420135666639 has 16 divisors (see below), whose sum is σ = 616107297792. Its totient is φ = 253044066528.

The previous prime is 420135666581. The next prime is 420135666647. The reversal of 420135666639 is 936666531024.

It is not a de Polignac number, because 420135666639 - 2³¹ = 417988182991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420135666591 and 420135666600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420135666659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114601459 + ... + 114605124.

It is an arithmetic number, because the mean of its divisors is an integer number (38506706112).

Almost surely, 2^420135666639 is an apocalyptic number.

420135666639 is a deficient number, since it is larger than the sum of its proper divisors (195971631153).

420135666639 is a wasteful number, since it uses less digits than its factorization.

420135666639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229206646.

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 420135666639 in words is "four hundred twenty billion, one hundred thirty-five million, six hundred sixty-six thousand, six hundred thirty-nine".