61520612 has 6 divisors (see below), whose sum is σ = 107661078. Its totient is φ = 30760304.

The previous prime is 61520611. The next prime is 61520663. The reversal of 61520612 is 21602516.

It can be written as a sum of positive squares in only one way, i.e., 59228416 + 2292196 = 7696^2 + 1514^2 .

It is not an unprimeable number, because it can be changed into a prime (61520611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7690073 + ... + 7690080.

It is an arithmetic number, because the mean of its divisors is an integer number (17943513).

Almost surely, 2^61520612 is an apocalyptic number.

It is an amenable number.

61520612 is a deficient number, since it is larger than the sum of its proper divisors (46140466).

61520612 is a wasteful number, since it uses less digits than its factorization.

61520612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15380157 (or 15380155 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 61520612 is about 7843.5076337057. The cubic root of 61520612 is about 394.7664313751.

The spelling of 61520612 in words is "sixty-one million, five hundred twenty thousand, six hundred twelve".