641463515 has 16 divisors (see below), whose sum is σ = 959696640. Its totient is φ = 399873120.

The previous prime is 641463509. The next prime is 641463523. The reversal of 641463515 is 515364146.

It is not a de Polignac number, because 641463515 - 2⁶ = 641463451 is a prime.

It is a super-2 number, since 2×641463515² = 822950882152310450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 832685 + ... + 833454.

It is an arithmetic number, because the mean of its divisors is an integer number (59981040).

Almost surely, 2^641463515 is an apocalyptic number.

641463515 is a deficient number, since it is larger than the sum of its proper divisors (318233125).

641463515 is a wasteful number, since it uses less digits than its factorization.

641463515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666162.

The product of its digits is 43200, while the sum is 35.

The square root of 641463515 is about 25327.1300190132. The cubic root of 641463515 is about 862.4302608319.

The spelling of 641463515 in words is "six hundred forty-one million, four hundred sixty-three thousand, five hundred fifteen".