7538381557 has 8 divisors (see below), whose sum is σ = 8815649216. Its totient is φ = 6311202912.

The previous prime is 7538381531. The next prime is 7538381567. The reversal of 7538381557 is 7551838357.

It is a happy number.

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

It is not a de Polignac number, because 7538381557 - 2¹⁹ = 7537857269 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 (7538381567) 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, 12521928 + ... + 12522529.

It is an arithmetic number, because the mean of its divisors is an integer number (1101956152).

Almost surely, 2^7538381557 is an apocalyptic number.

It is an amenable number.

7538381557 is a deficient number, since it is larger than the sum of its proper divisors (1277267659).

7538381557 is a wasteful number, since it uses less digits than its factorization.

7538381557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25044507.

The product of its digits is 3528000, while the sum is 52.

The square root of 7538381557 is about 86823.8536175399. The cubic root of 7538381557 is about 1960.7672233266.

The spelling of 7538381557 in words is "seven billion, five hundred thirty-eight million, three hundred eighty-one thousand, five hundred fifty-seven".