61145465 has 4 divisors (see below), whose sum is σ = 73374564. Its totient is φ = 48916368.

The previous prime is 61145453. The next prime is 61145467. The reversal of 61145465 is 56454116.

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 18386944 + 42758521 = 4288^2 + 6539^2 .

It is a cyclic number.

It is not a de Polignac number, because 61145465 - 2²⁰ = 60096889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61145467) 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, 6114542 + ... + 6114551.

It is an arithmetic number, because the mean of its divisors is an integer number (18343641).

Almost surely, 2^61145465 is an apocalyptic number.

It is an amenable number.

61145465 is a deficient number, since it is larger than the sum of its proper divisors (12229099).

61145465 is a wasteful number, since it uses less digits than its factorization.

61145465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12229098.

The product of its digits is 14400, while the sum is 32.

The square root of 61145465 is about 7819.5565731057. The cubic root of 61145465 is about 393.9623784154.

The spelling of 61145465 in words is "sixty-one million, one hundred forty-five thousand, four hundred sixty-five".