61040505 has 32 divisors (see below), whose sum is σ = 105442560. Its totient is φ = 30060800.

The previous prime is 61040479. The next prime is 61040509. The reversal of 61040505 is 50504016.

It is a happy number.

It is not a de Polignac number, because 61040505 - 2²² = 56846201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61040509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6955 + ... + 13055.

It is an arithmetic number, because the mean of its divisors is an integer number (3295080).

Almost surely, 2^61040505 is an apocalyptic number.

It is an amenable number.

61040505 is a deficient number, since it is larger than the sum of its proper divisors (44402055).

61040505 is a wasteful number, since it uses less digits than its factorization.

61040505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6161.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 61040505 is about 7812.8423125006. The cubic root of 61040505 is about 393.7368289875.

The spelling of 61040505 in words is "sixty-one million, forty thousand, five hundred five".