420719935557 has 16 divisors (see below), whose sum is σ = 590524141760. Its totient is φ = 265699844352.

The previous prime is 420719935547. The next prime is 420719935561. The reversal of 420719935557 is 755539917024.

It is a happy number.

It is not a de Polignac number, because 420719935557 - 2²⁰ = 420718886981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420719935497 and 420719935506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420719935547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624843 + ... + 1109895.

It is an arithmetic number, because the mean of its divisors is an integer number (36907758860).

Almost surely, 2^420719935557 is an apocalyptic number.

It is an amenable number.

420719935557 is a deficient number, since it is larger than the sum of its proper divisors (169804206203).

420719935557 is a wasteful number, since it uses less digits than its factorization.

420719935557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500292.

The product of its (nonzero) digits is 11907000, while the sum is 57.

The spelling of 420719935557 in words is "four hundred twenty billion, seven hundred nineteen million, nine hundred thirty-five thousand, five hundred fifty-seven".