61278612530 has 16 divisors (see below), whose sum is σ = 110447224920. Its totient is φ = 24479062272.

The previous prime is 61278612503. The next prime is 61278612553. The reversal of 61278612530 is 3521687216.

61278612530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 31046792401 + 30231820129 = 176201^2 + 173873^2 .

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, 4039895 + ... + 4055034.

Almost surely, 2^61278612530 is an apocalyptic number.

61278612530 is a deficient number, since it is larger than the sum of its proper divisors (49168612390).

61278612530 is a wasteful number, since it uses less digits than its factorization.

61278612530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8095693.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 61278612530 in words is "sixty-one billion, two hundred seventy-eight million, six hundred twelve thousand, five hundred thirty".