420193006551 has 12 divisors (see below), whose sum is σ = 627874607880. Its totient is φ = 270469061520.

The previous prime is 420193006547. The next prime is 420193006567. The reversal of 420193006551 is 155600391024.

It is not a de Polignac number, because 420193006551 - 2² = 420193006547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420193006511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 804967185 + ... + 804967706.

It is an arithmetic number, because the mean of its divisors is an integer number (52322883990).

Almost surely, 2^420193006551 is an apocalyptic number.

420193006551 is a deficient number, since it is larger than the sum of its proper divisors (207681601329).

420193006551 is a wasteful number, since it uses less digits than its factorization.

420193006551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609934926 (or 1609934923 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

Adding to 420193006551 its reverse (155600391024), we get a palindrome (575793397575).

The spelling of 420193006551 in words is "four hundred twenty billion, one hundred ninety-three million, six thousand, five hundred fifty-one".