75388139507 has 2 divisors, whose sum is σ = 75388139508. Its totient is φ = 75388139506.

The previous prime is 75388139503. The next prime is 75388139573. The reversal of 75388139507 is 70593188357.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75388139507 - 2² = 75388139503 is a prime.

It is not a weakly prime, because it can be changed into another prime (75388139503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37694069753 + 37694069754.

It is an arithmetic number, because the mean of its divisors is an integer number (37694069754).

Almost surely, 2^75388139507 is an apocalyptic number.

75388139507 is a deficient number, since it is larger than the sum of its proper divisors (1).

75388139507 is an equidigital number, since it uses as much as digits as its factorization.

75388139507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6350400, while the sum is 56.

The spelling of 75388139507 in words is "seventy-five billion, three hundred eighty-eight million, one hundred thirty-nine thousand, five hundred seven".