641402015 has 8 divisors (see below), whose sum is σ = 777303648. Its totient is φ = 508040800.

The previous prime is 641402009. The next prime is 641402023. The reversal of 641402015 is 510204146.

641402015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641402015 - 2¹⁸ = 641139871 is a prime.

It is a super-2 number, since 2×641402015² = 822793089692120450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634547 + ... + 635556.

It is an arithmetic number, because the mean of its divisors is an integer number (97162956).

Almost surely, 2^641402015 is an apocalyptic number.

641402015 is a deficient number, since it is larger than the sum of its proper divisors (135901633).

641402015 is a wasteful number, since it uses less digits than its factorization.

641402015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270209.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 641402015 is about 25325.9158768247. The cubic root of 641402015 is about 862.4026982582.

The spelling of 641402015 in words is "six hundred forty-one million, four hundred two thousand, fifteen".