420773379561 has 20 divisors (see below), whose sum is σ = 633360907344. Its totient is φ = 278374239000.

The previous prime is 420773379547. The next prime is 420773379577. The reversal of 420773379561 is 165973377024.

420773379561 is a `hidden beast` number, since 4 + 2 + 0 + 7 + 7 + 3 + 3 + 79 + 561 = 666.

It is not a de Polignac number, because 420773379561 - 2⁹ = 420773379049 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 420773379498 and 420773379507.

It is not an unprimeable number, because it can be changed into a prime (420773379541) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19816615 + ... + 19837836.

Almost surely, 2^420773379561 is an apocalyptic number.

It is an amenable number.

420773379561 is a deficient number, since it is larger than the sum of its proper divisors (212587527783).

420773379561 is a wasteful number, since it uses less digits than its factorization.

420773379561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39654594 (or 39654585 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 54.

The spelling of 420773379561 in words is "four hundred twenty billion, seven hundred seventy-three million, three hundred seventy-nine thousand, five hundred sixty-one".