1641265530 has 32 divisors (see below), whose sum is σ = 3943684800. Its totient is φ = 437154432.

The previous prime is 1641265529. The next prime is 1641265531. The reversal of 1641265530 is 355621461.

It is an interprime number because it is at equal distance from previous prime (1641265529) and next prime (1641265531).

It is a junction number, because it is equal to n+sod(n) for n = 1641265491 and 1641265500.

It is not an unprimeable number, because it can be changed into a prime (1641265531) 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, 6075 + ... + 57614.

It is an arithmetic number, because the mean of its divisors is an integer number (123240150).

Almost surely, 2^1641265530 is an apocalyptic number.

1641265530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641265530 is an abundant number, since it is smaller than the sum of its proper divisors (2302419270).

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

1641265530 is a wasteful number, since it uses less digits than its factorization.

1641265530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64558.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1641265530 is about 40512.5354674328. The cubic root of 1641265530 is about 1179.5769646081.

Adding to 1641265530 its reverse (355621461), we get a palindrome (1996886991).

The spelling of 1641265530 in words is "one billion, six hundred forty-one million, two hundred sixty-five thousand, five hundred thirty".