75061515149 has 2 divisors, whose sum is σ = 75061515150. Its totient is φ = 75061515148.

The previous prime is 75061515143. The next prime is 75061515181. The reversal of 75061515149 is 94151516057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74593441924 + 468073225 = 273118^2 + 21635^2 .

It is a cyclic number.

It is not a de Polignac number, because 75061515149 - 2¹² = 75061511053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75061515143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37530757574 + 37530757575.

It is an arithmetic number, because the mean of its divisors is an integer number (37530757575).

Almost surely, 2^75061515149 is an apocalyptic number.

It is an amenable number.

75061515149 is a deficient number, since it is larger than the sum of its proper divisors (1).

75061515149 is an equidigital number, since it uses as much as digits as its factorization.

75061515149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 44.

The spelling of 75061515149 in words is "seventy-five billion, sixty-one million, five hundred fifteen thousand, one hundred forty-nine".