61669152 has 36 divisors (see below), whose sum is σ = 175372470. Its totient is φ = 20556288.

The previous prime is 61669147. The next prime is 61669169. The reversal of 61669152 is 25196616.

It can be written as a sum of positive squares in only one way, i.e., 61402896 + 266256 = 7836^2 + 516^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106777 + ... + 107352.

Almost surely, 2^61669152 is an apocalyptic number.

It is an amenable number.

61669152 is an abundant number, since it is smaller than the sum of its proper divisors (113703318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61669152 is a wasteful number, since it uses less digits than its factorization.

61669152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214145 (or 214134 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 61669152 is about 7852.9709027858. The cubic root of 61669152 is about 395.0838939468.

The spelling of 61669152 in words is "sixty-one million, six hundred sixty-nine thousand, one hundred fifty-two".