820628459629 has 8 divisors (see below), whose sum is σ = 895269907872. Its totient is φ = 745993488240.

The previous prime is 820628459617. The next prime is 820628459653. The reversal of 820628459629 is 926954826028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 820628459629 - 2⁵ = 820628459597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820628456629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1352374 + ... + 1862839.

It is an arithmetic number, because the mean of its divisors is an integer number (111908738484).

Almost surely, 2^820628459629 is an apocalyptic number.

It is an amenable number.

820628459629 is a deficient number, since it is larger than the sum of its proper divisors (74641448243).

820628459629 is a wasteful number, since it uses less digits than its factorization.

820628459629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238427.

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 820628459629 in words is "eight hundred twenty billion, six hundred twenty-eight million, four hundred fifty-nine thousand, six hundred twenty-nine".