75551514391 has 2 divisors, whose sum is σ = 75551514392. Its totient is φ = 75551514390.

The previous prime is 75551514317. The next prime is 75551514413. The reversal of 75551514391 is 19341515557.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75551514391 - 2³¹ = 73404030743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75551514991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37775757195 + 37775757196.

It is an arithmetic number, because the mean of its divisors is an integer number (37775757196).

Almost surely, 2^75551514391 is an apocalyptic number.

75551514391 is a deficient number, since it is larger than the sum of its proper divisors (1).

75551514391 is an equidigital number, since it uses as much as digits as its factorization.

75551514391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472500, while the sum is 46.

The spelling of 75551514391 in words is "seventy-five billion, five hundred fifty-one million, five hundred fourteen thousand, three hundred ninety-one".