38519221682 has 18 divisors (see below), whose sum is σ = 58368871197. Its totient is φ = 19064903904.

The previous prime is 38519221681. The next prime is 38519221693. The reversal of 38519221682 is 28612291583.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21394620361 + 17124601321 = 146269^2 + 130861^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=138779.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38519221681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29698058 + ... + 29699354.

Almost surely, 2^38519221682 is an apocalyptic number.

38519221682 is a deficient number, since it is larger than the sum of its proper divisors (19849649515).

38519221682 is an frugal number, since it uses more digits than its factorization.

38519221682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810 (or 1406 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The spelling of 38519221682 in words is "thirty-eight billion, five hundred nineteen million, two hundred twenty-one thousand, six hundred eighty-two".