61281955 has 8 divisors (see below), whose sum is σ = 84043872. Its totient is φ = 42021888.

The previous prime is 61281949. The next prime is 61281977. The reversal of 61281955 is 55918216.

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

It is a cyclic number.

It is not a de Polignac number, because 61281955 - 2⁷ = 61281827 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875422 + ... + 875491.

It is an arithmetic number, because the mean of its divisors is an integer number (10505484).

Almost surely, 2^61281955 is an apocalyptic number.

61281955 is a deficient number, since it is larger than the sum of its proper divisors (22761917).

61281955 is a wasteful number, since it uses less digits than its factorization.

61281955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750925.

The product of its digits is 21600, while the sum is 37.

The square root of 61281955 is about 7828.2791851083. The cubic root of 61281955 is about 394.2552971917.

The spelling of 61281955 in words is "sixty-one million, two hundred eighty-one thousand, nine hundred fifty-five".