38453731687 has 4 divisors (see below), whose sum is σ = 43947121936. Its totient is φ = 32960341440.

The previous prime is 38453731649. The next prime is 38453731691. The reversal of 38453731687 is 78613735483.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78613735483 = 2477 ⋅31737479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38453731687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38453731607) 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, 2746695114 + ... + 2746695127.

It is an arithmetic number, because the mean of its divisors is an integer number (10986780484).

Almost surely, 2^38453731687 is an apocalyptic number.

38453731687 is a deficient number, since it is larger than the sum of its proper divisors (5493390249).

38453731687 is an equidigital number, since it uses as much as digits as its factorization.

38453731687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493390248.

The product of its digits is 10160640, while the sum is 55.

The spelling of 38453731687 in words is "thirty-eight billion, four hundred fifty-three million, seven hundred thirty-one thousand, six hundred eighty-seven".