3972261658438 has 8 divisors (see below), whose sum is σ = 5994947043288. Its totient is φ = 1973945977344.

The previous prime is 3972261658411. The next prime is 3972261658439. The reversal of 3972261658438 is 8348561622793.

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

It is a super-3 number, since 3×3972261658438³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 3972261658438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972261658439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6092425531 + ... + 6092426182.

It is an arithmetic number, because the mean of its divisors is an integer number (749368380411).

Almost surely, 2^{3972261658438} is an apocalyptic number.

3972261658438 is a deficient number, since it is larger than the sum of its proper divisors (2022685384850).

3972261658438 is a wasteful number, since it uses less digits than its factorization.

3972261658438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12184851878.

The product of its digits is 104509440, while the sum is 64.

The spelling of 3972261658438 in words is "three trillion, nine hundred seventy-two billion, two hundred sixty-one million, six hundred fifty-eight thousand, four hundred thirty-eight".