74528594137 has 2 divisors, whose sum is σ = 74528594138. Its totient is φ = 74528594136.

The previous prime is 74528594081. The next prime is 74528594183. The reversal of 74528594137 is 73149582547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38064400201 + 36464193936 = 195101^2 + 190956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74528594137 is a prime.

It is a super-2 number, since 2×74528594137² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74528594197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37264297068 + 37264297069.

It is an arithmetic number, because the mean of its divisors is an integer number (37264297069).

Almost surely, 2^74528594137 is an apocalyptic number.

It is an amenable number.

74528594137 is a deficient number, since it is larger than the sum of its proper divisors (1).

74528594137 is an equidigital number, since it uses as much as digits as its factorization.

74528594137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8467200, while the sum is 55.

The spelling of 74528594137 in words is "seventy-four billion, five hundred twenty-eight million, five hundred ninety-four thousand, one hundred thirty-seven".