61880072 has 8 divisors (see below), whose sum is σ = 116025150. Its totient is φ = 30940032.

The previous prime is 61880057. The next prime is 61880081. The reversal of 61880072 is 27008816.

It can be written as a sum of positive squares in only one way, i.e., 61559716 + 320356 = 7846^2 + 566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3867497 + ... + 3867512.

Almost surely, 2^61880072 is an apocalyptic number.

It is an amenable number.

61880072 is a deficient number, since it is larger than the sum of its proper divisors (54145078).

61880072 is a wasteful number, since it uses less digits than its factorization.

61880072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7735015 (or 7735011 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 61880072 is about 7866.3887521530. The cubic root of 61880072 is about 395.5338016110.

Adding to 61880072 its reverse (27008816), we get a palindrome (88888888).

The spelling of 61880072 in words is "sixty-one million, eight hundred eighty thousand, seventy-two".