75415595161 has 9 divisors (see below), whose sum is σ = 76197701343. Its totient is φ = 74641444200.

The previous prime is 75415595153. The next prime is 75415595191. The reversal of 75415595161 is 16159551457.

The square root of 75415595161 is 274619.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 72458410761 + 2957184400 = 269181^2 + 54380^2 .

It is not a de Polignac number, because 75415595161 - 2³ = 75415595153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75415595191) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27735160 + ... + 27737878.

Almost surely, 2^75415595161 is an apocalyptic number.

75415595161 is the 274619-th square number.

75415595161 is the 137310-th centered octagonal number.

It is an amenable number.

75415595161 is a deficient number, since it is larger than the sum of its proper divisors (782106182).

75415595161 is an frugal number, since it uses more digits than its factorization.

75415595161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640 (or 2820 counting only the distinct ones).

The product of its digits is 945000, while the sum is 49.

Multiplying 75415595161 by its sum of digits (49), we get a square (3695364162889 = 1922333²).

The spelling of 75415595161 in words is "seventy-five billion, four hundred fifteen million, five hundred ninety-five thousand, one hundred sixty-one".