38387775641621 has 16 divisors (see below), whose sum is σ = 44115627873408. Its totient is φ = 32720906836800.

The previous prime is 38387775641521. The next prime is 38387775641629. The reversal of 38387775641621 is 12614657778383.

38387775641621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38387775641621 - 2¹⁴ = 38387775625237 is a prime.

It is a super-2 number, since 2×38387775641621² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38387775641629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37919651 + ... + 38918831.

It is an arithmetic number, because the mean of its divisors is an integer number (2757226742088).

Almost surely, 2^{38387775641621} is an apocalyptic number.

It is an amenable number.

38387775641621 is a deficient number, since it is larger than the sum of its proper divisors (5727852231787).

38387775641621 is a wasteful number, since it uses less digits than its factorization.

38387775641621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029692.

The product of its digits is 284497920, while the sum is 68.

The spelling of 38387775641621 in words is "thirty-eight trillion, three hundred eighty-seven billion, seven hundred seventy-five million, six hundred forty-one thousand, six hundred twenty-one".