38081362661 has 4 divisors (see below), whose sum is σ = 38088006252. Its totient is φ = 38074719072.

The previous prime is 38081362651. The next prime is 38081362721. The reversal of 38081362661 is 16626318083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16626318083 = 4079 ⋅4076077.

It can be written as a sum of positive squares in 2 ways, for example, as 4886709025 + 33194653636 = 69905^2 + 182194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38081362661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38081362651) 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, 3313190 + ... + 3324663.

It is an arithmetic number, because the mean of its divisors is an integer number (9522001563).

Almost surely, 2^38081362661 is an apocalyptic number.

It is an amenable number.

38081362661 is a deficient number, since it is larger than the sum of its proper divisors (6643591).

38081362661 is an equidigital number, since it uses as much as digits as its factorization.

38081362661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6643590.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 38081362661 in words is "thirty-eight billion, eighty-one million, three hundred sixty-two thousand, six hundred sixty-one".