61321475161 has 8 divisors (see below), whose sum is σ = 61376672448. Its totient is φ = 61266306000.

The previous prime is 61321475153. The next prime is 61321475167. The reversal of 61321475161 is 16157412316.

61321475161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61321475161 - 2³ = 61321475153 is a prime.

It is a super-2 number, since 2×61321475161² (a number of 22 digits) contains 22 as substring.

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 61321475161.

It is not an unprimeable number, because it can be changed into a prime (61321475167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7374196 + ... + 7382506.

It is an arithmetic number, because the mean of its divisors is an integer number (7672084056).

Almost surely, 2^61321475161 is an apocalyptic number.

It is an amenable number.

61321475161 is a deficient number, since it is larger than the sum of its proper divisors (55197287).

61321475161 is a wasteful number, since it uses less digits than its factorization.

61321475161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14063.

The product of its digits is 30240, while the sum is 37.

Adding to 61321475161 its reverse (16157412316), we get a palindrome (77478887477).

The spelling of 61321475161 in words is "sixty-one billion, three hundred twenty-one million, four hundred seventy-five thousand, one hundred sixty-one".