1641402557505 has 48 divisors (see below), whose sum is σ = 2956269476160. Its totient is φ = 873694496448.

The previous prime is 1641402557357. The next prime is 1641402557737. The reversal of 1641402557505 is 5057552041461.

1641402557505 is a `hidden beast` number, since 1 + 6 + 4 + 1 + 40 + 2 + 557 + 50 + 5 = 666.

It is not a de Polignac number, because 1641402557505 - 2¹⁵ = 1641402524737 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 708627 + ... + 1945496.

It is an arithmetic number, because the mean of its divisors is an integer number (61588947420).

Almost surely, 2^{1641402557505} is an apocalyptic number.

1641402557505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1641402557505 is a deficient number, since it is larger than the sum of its proper divisors (1314866918655).

1641402557505 is an equidigital number, since it uses as much as digits as its factorization.

1641402557505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654652 (or 2654640 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

Adding to 1641402557505 its reverse (5057552041461), we get a palindrome (6698954598966).

The spelling of 1641402557505 in words is "one trillion, six hundred forty-one billion, four hundred two million, five hundred fifty-seven thousand, five hundred five".