61355145 has 16 divisors (see below), whose sum is σ = 102436992. Its totient is φ = 31299840.

The previous prime is 61355141. The next prime is 61355179. The reversal of 61355145 is 54155316.

It is not a de Polignac number, because 61355145 - 2² = 61355141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61355141) 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 15 ways as a sum of consecutive naturals, for example, 88576 + ... + 89265.

It is an arithmetic number, because the mean of its divisors is an integer number (6402312).

Almost surely, 2^61355145 is an apocalyptic number.

It is an amenable number.

61355145 is a deficient number, since it is larger than the sum of its proper divisors (41081847).

61355145 is a wasteful number, since it uses less digits than its factorization.

61355145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177872.

The product of its digits is 9000, while the sum is 30.

The square root of 61355145 is about 7832.9525084734. The cubic root of 61355145 is about 394.4121898435.

The spelling of 61355145 in words is "sixty-one million, three hundred fifty-five thousand, one hundred forty-five".