1641280526628 has 48 divisors (see below), whose sum is σ = 4033454658240. Its totient is φ = 518011200000.

The previous prime is 1641280526621. The next prime is 1641280526731. The reversal of 1641280526628 is 8266250821461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1641280526621) 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, 1587873 + ... + 2409128.

It is an arithmetic number, because the mean of its divisors is an integer number (84030305380).

Almost surely, 2^{1641280526628} is an apocalyptic number.

It is an amenable number.

1641280526628 is an abundant number, since it is smaller than the sum of its proper divisors (2392174131612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641280526628 is a wasteful number, since it uses less digits than its factorization.

1641280526628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998828 (or 3998826 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 1641280526628 in words is "one trillion, six hundred forty-one billion, two hundred eighty million, five hundred twenty-six thousand, six hundred twenty-eight".