1641541515 has 16 divisors (see below), whose sum is σ = 2627109888. Its totient is φ = 875274336.

The previous prime is 1641541459. The next prime is 1641541523. The reversal of 1641541515 is 5151451461.

It is not a de Polignac number, because 1641541515 - 2¹² = 1641537419 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64452 + ... + 86238.

It is an arithmetic number, because the mean of its divisors is an integer number (164194368).

Almost surely, 2^1641541515 is an apocalyptic number.

1641541515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1641541515 is a deficient number, since it is larger than the sum of its proper divisors (985568373).

1641541515 is a wasteful number, since it uses less digits than its factorization.

1641541515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26818.

The product of its digits is 12000, while the sum is 33.

The square root of 1641541515 is about 40515.9414922077. The cubic root of 1641541515 is about 1179.6430776770.

Adding to 1641541515 its reverse (5151451461), we get a palindrome (6792992976).

The spelling of 1641541515 in words is "one billion, six hundred forty-one million, five hundred forty-one thousand, five hundred fifteen".