61503945 has 8 divisors (see below), whose sum is σ = 98406336. Its totient is φ = 32802096.

The previous prime is 61503899. The next prime is 61503947. The reversal of 61503945 is 54930516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61503945 - 2⁶ = 61503881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61503947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2050117 + ... + 2050146.

It is an arithmetic number, because the mean of its divisors is an integer number (12300792).

Almost surely, 2^61503945 is an apocalyptic number.

It is an amenable number.

61503945 is a deficient number, since it is larger than the sum of its proper divisors (36902391).

61503945 is a wasteful number, since it uses less digits than its factorization.

61503945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100271.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 61503945 is about 7842.4450906589. The cubic root of 61503945 is about 394.7307784659.

The spelling of 61503945 in words is "sixty-one million, five hundred three thousand, nine hundred forty-five".