420508702078 has 4 divisors (see below), whose sum is σ = 630763053120. Its totient is φ = 210254351038.

The previous prime is 420508702039. The next prime is 420508702129. The reversal of 420508702078 is 870207805024.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105127175518 + ... + 105127175521.

It is an arithmetic number, because the mean of its divisors is an integer number (157690763280).

Almost surely, 2^420508702078 is an apocalyptic number.

420508702078 is a deficient number, since it is larger than the sum of its proper divisors (210254351042).

420508702078 is a wasteful number, since it uses less digits than its factorization.

420508702078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210254351041.

The product of its (nonzero) digits is 250880, while the sum is 43.

The spelling of 420508702078 in words is "four hundred twenty billion, five hundred eight million, seven hundred two thousand, seventy-eight".