420547653561 has 16 divisors (see below), whose sum is σ = 640869202944. Its totient is φ = 240299938704.

The previous prime is 420547653541. The next prime is 420547653653. The reversal of 420547653561 is 165356745024.

It is not a de Polignac number, because 420547653561 - 2²⁷ = 420413435833 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420547653561.

It is not an unprimeable number, because it can be changed into a prime (420547653541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137661 + ... + 927386.

It is an arithmetic number, because the mean of its divisors is an integer number (40054325184).

Almost surely, 2^420547653561 is an apocalyptic number.

It is an amenable number.

420547653561 is a deficient number, since it is larger than the sum of its proper divisors (220321549383).

420547653561 is a wasteful number, since it uses less digits than its factorization.

420547653561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083860.

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 420547653561 in words is "four hundred twenty billion, five hundred forty-seven million, six hundred fifty-three thousand, five hundred sixty-one".