27621145152381 has 16 divisors (see below), whose sum is σ = 40179176159040. Its totient is φ = 16738852542720.

The previous prime is 27621145152353. The next prime is 27621145152401. The reversal of 27621145152381 is 18325154112672.

It is not a de Polignac number, because 27621145152381 - 2¹⁰ = 27621145151357 is a prime.

It is a super-2 number, since 2×27621145152381² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27621145152381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27621145152481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30431686 + ... + 31326183.

It is an arithmetic number, because the mean of its divisors is an integer number (2511198509940).

Almost surely, 2^{27621145152381} is an apocalyptic number.

It is an amenable number.

27621145152381 is a deficient number, since it is larger than the sum of its proper divisors (12558031006659).

27621145152381 is a wasteful number, since it uses less digits than its factorization.

27621145152381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61771436.

The product of its digits is 806400, while the sum is 48.

The spelling of 27621145152381 in words is "twenty-seven trillion, six hundred twenty-one billion, one hundred forty-five million, one hundred fifty-two thousand, three hundred eighty-one".