641376249842 has 8 divisors (see below), whose sum is σ = 969086742876. Its totient is φ = 318347335552.

The previous prime is 641376249823. The next prime is 641376249893. The reversal of 641376249842 is 248942673146.

It can be written as a sum of positive squares in 2 ways, for example, as 573562360921 + 67813888921 = 757339^2 + 260411^2 .

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

It is a super-3 number, since 3×641376249842³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 3 ways as a sum of consecutive naturals, for example, 1170394343 + ... + 1170394890.

Almost surely, 2^641376249842 is an apocalyptic number.

641376249842 is a deficient number, since it is larger than the sum of its proper divisors (327710493034).

641376249842 is a wasteful number, since it uses less digits than its factorization.

641376249842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340789372.

The product of its digits is 13934592, while the sum is 56.

The spelling of 641376249842 in words is "six hundred forty-one billion, three hundred seventy-six million, two hundred forty-nine thousand, eight hundred forty-two".