428621133651 has 16 divisors (see below), whose sum is σ = 580064018688. Its totient is φ = 281463415200.

The previous prime is 428621133593. The next prime is 428621133691. The reversal of 428621133651 is 156331126824.

It is not a de Polignac number, because 428621133651 - 2¹⁵ = 428621100883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428621133691) 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, 3278721 + ... + 3406941.

It is an arithmetic number, because the mean of its divisors is an integer number (36254001168).

Almost surely, 2^428621133651 is an apocalyptic number.

428621133651 is a deficient number, since it is larger than the sum of its proper divisors (151442885037).

428621133651 is a wasteful number, since it uses less digits than its factorization.

428621133651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144922.

The product of its digits is 207360, while the sum is 42.

The spelling of 428621133651 in words is "four hundred twenty-eight billion, six hundred twenty-one million, one hundred thirty-three thousand, six hundred fifty-one".