420549438078 has 64 divisors (see below), whose sum is σ = 1165158627840. Its totient is φ = 109233619200.

The previous prime is 420549438061. The next prime is 420549438109. The reversal of 420549438078 is 870834945024.

420549438078 is a `hidden beast` number, since 4 + 2 + 0 + 5 + 494 + 3 + 80 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50566963 + ... + 50575278.

It is an arithmetic number, because the mean of its divisors is an integer number (18205603560).

Almost surely, 2^420549438078 is an apocalyptic number.

420549438078 is an abundant number, since it is smaller than the sum of its proper divisors (744609189762).

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

420549438078 is a wasteful number, since it uses less digits than its factorization.

420549438078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101142270 (or 101142264 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 420549438078 in words is "four hundred twenty billion, five hundred forty-nine million, four hundred thirty-eight thousand, seventy-eight".