421488305778 has 16 divisors (see below), whose sum is σ = 846335087136. Its totient is φ = 139936356000.

The previous prime is 421488305743. The next prime is 421488305803. The reversal of 421488305778 is 877503884124.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139934851 + ... + 139937862.

It is an arithmetic number, because the mean of its divisors is an integer number (52895942946).

Almost surely, 2^421488305778 is an apocalyptic number.

421488305778 is an abundant number, since it is smaller than the sum of its proper divisors (424846781358).

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

421488305778 is a wasteful number, since it uses less digits than its factorization.

421488305778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279872969.

The product of its (nonzero) digits is 12042240, while the sum is 57.

The spelling of 421488305778 in words is "four hundred twenty-one billion, four hundred eighty-eight million, three hundred five thousand, seven hundred seventy-eight".