420725556775 has 12 divisors (see below), whose sum is σ = 530252146264. Its totient is φ = 331062732000.

The previous prime is 420725556767. The next prime is 420725556793. The reversal of 420725556775 is 577655527024.

It is not a de Polignac number, because 420725556775 - 2³ = 420725556767 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 137941281 + ... + 137944330.

Almost surely, 2^420725556775 is an apocalyptic number.

420725556775 is a deficient number, since it is larger than the sum of its proper divisors (109526589489).

420725556775 is a wasteful number, since it uses less digits than its factorization.

420725556775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275885682 (or 275885677 counting only the distinct ones).

The product of its (nonzero) digits is 20580000, while the sum is 55.

The spelling of 420725556775 in words is "four hundred twenty billion, seven hundred twenty-five million, five hundred fifty-six thousand, seven hundred seventy-five".