61526237968 has 20 divisors (see below), whose sum is σ = 128376862348. Its totient is φ = 28396725120.

The previous prime is 61526237951. The next prime is 61526238017. The reversal of 61526237968 is 86973262516.

It can be written as a sum of positive squares in 2 ways, for example, as 25200927504 + 36325310464 = 158748^2 + 190592^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147899403 + ... + 147899818.

Almost surely, 2^61526237968 is an apocalyptic number.

It is an amenable number.

61526237968 is an abundant number, since it is smaller than the sum of its proper divisors (66850624380).

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

61526237968 is a wasteful number, since it uses less digits than its factorization.

61526237968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295799242 (or 295799236 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The spelling of 61526237968 in words is "sixty-one billion, five hundred twenty-six million, two hundred thirty-seven thousand, nine hundred sixty-eight".