420725556725 has 24 divisors (see below), whose sum is σ = 522479678208. Its totient is φ = 336077596800.

The previous prime is 420725556721. The next prime is 420725556731. The reversal of 420725556725 is 527655527024.

It is a happy number.

It is not a de Polignac number, because 420725556725 - 2² = 420725556721 is a prime.

It is a super-2 number, since 2×420725556725² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420725556721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99766817 + ... + 99771033.

It is an arithmetic number, because the mean of its divisors is an integer number (21769986592).

Almost surely, 2^420725556725 is an apocalyptic number.

It is an amenable number.

420725556725 is a deficient number, since it is larger than the sum of its proper divisors (101754121483).

420725556725 is a wasteful number, since it uses less digits than its factorization.

420725556725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9245 (or 9240 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 50.

The spelling of 420725556725 in words is "four hundred twenty billion, seven hundred twenty-five million, five hundred fifty-six thousand, seven hundred twenty-five".