420632387556 has 12 divisors (see below), whose sum is σ = 981475570992. Its totient is φ = 140210795848.

The previous prime is 420632387503. The next prime is 420632387569. The reversal of 420632387556 is 655783236024.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×420632387556² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420632387499 and 420632387508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17526349470 + ... + 17526349493.

It is an arithmetic number, because the mean of its divisors is an integer number (81789630916).

Almost surely, 2^420632387556 is an apocalyptic number.

It is an amenable number.

420632387556 is an abundant number, since it is smaller than the sum of its proper divisors (560843183436).

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

420632387556 is a wasteful number, since it uses less digits than its factorization.

420632387556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35052698970 (or 35052698968 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 420632387556 in words is "four hundred twenty billion, six hundred thirty-two million, three hundred eighty-seven thousand, five hundred fifty-six".