6401658774 has 32 divisors (see below), whose sum is σ = 14747590656. Its totient is φ = 1814641920.

The previous prime is 6401658773. The next prime is 6401658787. The reversal of 6401658774 is 4778561046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401658773) by changing a digit.

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, 594747 + ... + 605414.

It is an arithmetic number, because the mean of its divisors is an integer number (460862208).

Almost surely, 2^6401658774 is an apocalyptic number.

6401658774 is an abundant number, since it is smaller than the sum of its proper divisors (8345931882).

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

6401658774 is a wasteful number, since it uses less digits than its factorization.

6401658774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200300.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The square root of 6401658774 is about 80010.3666658265. The cubic root of 6401658774 is about 1856.7959226491.

The spelling of 6401658774 in words is "six billion, four hundred one million, six hundred fifty-eight thousand, seven hundred seventy-four".