61145415 has 24 divisors (see below), whose sum is σ = 108864720. Its totient is φ = 32562432.

The previous prime is 61145407. The next prime is 61145419. The reversal of 61145415 is 51454116.

61145415 is a `hidden beast` number, since 6 + 114 + 541 + 5 = 666.

It is not a de Polignac number, because 61145415 - 2³ = 61145407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61145419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90519 + ... + 91191.

It is an arithmetic number, because the mean of its divisors is an integer number (4536030).

Almost surely, 2^61145415 is an apocalyptic number.

61145415 is a deficient number, since it is larger than the sum of its proper divisors (47719305).

61145415 is an frugal number, since it uses more digits than its factorization.

61145415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 681 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 61145415 is about 7819.5533759928. The cubic root of 61145415 is about 393.9622710314.

The spelling of 61145415 in words is "sixty-one million, one hundred forty-five thousand, four hundred fifteen".