420387492578 has 12 divisors (see below), whose sum is σ = 669856195842. Its totient is φ = 197829408000.

The previous prime is 420387492563. The next prime is 420387492607. The reversal of 420387492578 is 875294783024.

It can be written as a sum of positive squares in 3 ways, for example, as 419615041729 + 772450849 = 647777^2 + 27793^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363656423 + ... + 363657578.

Almost surely, 2^420387492578 is an apocalyptic number.

420387492578 is a deficient number, since it is larger than the sum of its proper divisors (249468703264).

420387492578 is a wasteful number, since it uses less digits than its factorization.

420387492578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727314037 (or 727314020 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 420387492578 in words is "four hundred twenty billion, three hundred eighty-seven million, four hundred ninety-two thousand, five hundred seventy-eight".