75521281867 has 2 divisors, whose sum is σ = 75521281868. Its totient is φ = 75521281866.

The previous prime is 75521281859. The next prime is 75521281897. The reversal of 75521281867 is 76818212557.

It is a weak prime.

It is an emirp because it is prime and its reverse (76818212557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75521281867 - 2³ = 75521281859 is a prime.

It is not a weakly prime, because it can be changed into another prime (75521281807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37760640933 + 37760640934.

It is an arithmetic number, because the mean of its divisors is an integer number (37760640934).

Almost surely, 2^75521281867 is an apocalyptic number.

75521281867 is a deficient number, since it is larger than the sum of its proper divisors (1).

75521281867 is an equidigital number, since it uses as much as digits as its factorization.

75521281867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1881600, while the sum is 52.

The spelling of 75521281867 in words is "seventy-five billion, five hundred twenty-one million, two hundred eighty-one thousand, eight hundred sixty-seven".