420652513622451 has 128 divisors (see below), whose sum is σ = 691146165058560. Its totient is φ = 226137804963840.

The previous prime is 420652513622449. The next prime is 420652513622477. The reversal of 420652513622451 is 154226315256024.

It is not a de Polignac number, because 420652513622451 - 2¹ = 420652513622449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420652513622451.

It is not an unprimeable number, because it can be changed into a prime (420652513621451) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 248074671 + ... + 249764583.

It is an arithmetic number, because the mean of its divisors is an integer number (5399579414520).

Almost surely, 2^{420652513622451} is an apocalyptic number.

420652513622451 is a deficient number, since it is larger than the sum of its proper divisors (270493651436109).

420652513622451 is a wasteful number, since it uses less digits than its factorization.

420652513622451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690178 (or 1690156 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

Adding to 420652513622451 its reverse (154226315256024), we get a palindrome (574878828878475).

The spelling of 420652513622451 in words is "four hundred twenty trillion, six hundred fifty-two billion, five hundred thirteen million, six hundred twenty-two thousand, four hundred fifty-one".