420166781402 has 16 divisors (see below), whose sum is σ = 651884640000. Its totient is φ = 202899064320.

The previous prime is 420166781383. The next prime is 420166781407. The reversal of 420166781402 is 204187661024.

It is a self number, because there is not a number n which added to its sum of digits gives 420166781402.

It is not an unprimeable number, because it can be changed into a prime (420166781407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6759527 + ... + 6821402.

It is an arithmetic number, because the mean of its divisors is an integer number (40742790000).

Almost surely, 2^420166781402 is an apocalyptic number.

420166781402 is a deficient number, since it is larger than the sum of its proper divisors (231717858598).

420166781402 is a wasteful number, since it uses less digits than its factorization.

420166781402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13581461.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 420166781402 in words is "four hundred twenty billion, one hundred sixty-six million, seven hundred eighty-one thousand, four hundred two".