420215777256 has 64 divisors (see below), whose sum is σ = 1146110212800. Its totient is φ = 127330649600.

The previous prime is 420215777251. The next prime is 420215777273. The reversal of 420215777256 is 652777512024.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (420215777251) 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, 5896396 + ... + 5967236.

It is an arithmetic number, because the mean of its divisors is an integer number (17907972075).

Almost surely, 2^420215777256 is an apocalyptic number.

It is an amenable number.

420215777256 is an abundant number, since it is smaller than the sum of its proper divisors (725894435544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420215777256 is a wasteful number, since it uses less digits than its factorization.

420215777256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93330 (or 93326 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 48.

The spelling of 420215777256 in words is "four hundred twenty billion, two hundred fifteen million, seven hundred seventy-seven thousand, two hundred fifty-six".