420777688564 has 6 divisors (see below), whose sum is σ = 736360954994. Its totient is φ = 210388844280.

The previous prime is 420777688549. The next prime is 420777688571. The reversal of 420777688564 is 465886777024.

It can be written as a sum of positive squares in only one way, i.e., 392589964900 + 28187723664 = 626570^2 + 167892^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420777688496 and 420777688505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52597211067 + ... + 52597211074.

Almost surely, 2^420777688564 is an apocalyptic number.

It is an amenable number.

420777688564 is a deficient number, since it is larger than the sum of its proper divisors (315583266430).

420777688564 is a wasteful number, since it uses less digits than its factorization.

420777688564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105194422145 (or 105194422143 counting only the distinct ones).

The product of its (nonzero) digits is 126443520, while the sum is 64.

The spelling of 420777688564 in words is "four hundred twenty billion, seven hundred seventy-seven million, six hundred eighty-eight thousand, five hundred sixty-four".