38404187561 has 8 divisors (see below), whose sum is σ = 38628555264. Its totient is φ = 38180304400.

The previous prime is 38404187557. The next prime is 38404187567. The reversal of 38404187561 is 16578140483.

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

It is a cyclic number.

It is not a de Polignac number, because 38404187561 - 2² = 38404187557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38404187567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38456 + ... + 279798.

It is an arithmetic number, because the mean of its divisors is an integer number (4828569408).

Almost surely, 2^38404187561 is an apocalyptic number.

It is an amenable number.

38404187561 is a deficient number, since it is larger than the sum of its proper divisors (224367703).

38404187561 is a wasteful number, since it uses less digits than its factorization.

38404187561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242271.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 38404187561 in words is "thirty-eight billion, four hundred four million, one hundred eighty-seven thousand, five hundred sixty-one".