641987415 has 12 divisors (see below), whose sum is σ = 1112778264. Its totient is φ = 342393264.

The previous prime is 641987393. The next prime is 641987441. The reversal of 641987415 is 514789146.

It is not a de Polignac number, because 641987415 - 2⁵ = 641987383 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), and also a Moran number because the ratio is a prime number: 14266387 = 641987415 / (6 + 4 + 1 + 9 + 8 + 7 + 4 + 1 + 5).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7133149 + ... + 7133238.

It is an arithmetic number, because the mean of its divisors is an integer number (92731522).

Almost surely, 2^641987415 is an apocalyptic number.

641987415 is a deficient number, since it is larger than the sum of its proper divisors (470790849).

641987415 is a wasteful number, since it uses less digits than its factorization.

641987415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14266398 (or 14266395 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 641987415 is about 25337.4705722572. The cubic root of 641987415 is about 862.6649867113.

The spelling of 641987415 in words is "six hundred forty-one million, nine hundred eighty-seven thousand, four hundred fifteen".