610161505 has 4 divisors (see below), whose sum is σ = 732193812. Its totient is φ = 488129200.

The previous prime is 610161491. The next prime is 610161509. The reversal of 610161505 is 505161016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123032464 + 487129041 = 11092^2 + 22071^2 .

It is a de Polignac number, because none of the positive numbers 2^k-610161505 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 610161505.

It is not an unprimeable number, because it can be changed into a prime (610161509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61016146 + ... + 61016155.

It is an arithmetic number, because the mean of its divisors is an integer number (183048453).

Almost surely, 2^610161505 is an apocalyptic number.

It is an amenable number.

610161505 is a deficient number, since it is larger than the sum of its proper divisors (122032307).

610161505 is a wasteful number, since it uses less digits than its factorization.

610161505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122032306.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 610161505 is about 24701.4474272258. The cubic root of 610161505 is about 848.1674498927.

The spelling of 610161505 in words is "six hundred ten million, one hundred sixty-one thousand, five hundred five".