61501455 has 24 divisors (see below), whose sum is σ = 106950480. Its totient is φ = 32693760.

The previous prime is 61501417. The next prime is 61501457. The reversal of 61501455 is 55410516.

It is a happy number.

61501455 is a `hidden beast` number, since 615 + 0 + 1 + 45 + 5 = 666.

61501455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-61501455 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61501457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12831 + ... + 16959.

It is an arithmetic number, because the mean of its divisors is an integer number (4456270).

Almost surely, 2^61501455 is an apocalyptic number.

61501455 is a deficient number, since it is larger than the sum of its proper divisors (45449025).

61501455 is a wasteful number, since it uses less digits than its factorization.

61501455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471 (or 4468 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 61501455 is about 7842.2863375421. The cubic root of 61501455 is about 394.7254514748.

The spelling of 61501455 in words is "sixty-one million, five hundred one thousand, four hundred fifty-five".