61605115642 has 12 divisors (see below), whose sum is σ = 107494640730. Its totient is φ = 26402192376.

The previous prime is 61605115619. The next prime is 61605115651. The reversal of 61605115642 is 24651150616.

It can be written as a sum of positive squares in only one way, i.e., 36260157241 + 25344958401 = 190421^2 + 159201^2 .

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, 314311717 + ... + 314311912.

Almost surely, 2^61605115642 is an apocalyptic number.

61605115642 is a deficient number, since it is larger than the sum of its proper divisors (45889525088).

61605115642 is a wasteful number, since it uses less digits than its factorization.

61605115642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628623645 (or 628623638 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 61605115642 in words is "sixty-one billion, six hundred five million, one hundred fifteen thousand, six hundred forty-two".