61515701550075 has 48 divisors (see below), whose sum is σ = 102408846632576. Its totient is φ = 32581946995200.

The previous prime is 61515701550049. The next prime is 61515701550091. The reversal of 61515701550075 is 57005510751516.

It is a happy number.

It is not a de Polignac number, because 61515701550075 - 2⁶ = 61515701550011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13915980 + ... + 17795670.

Almost surely, 2^{61515701550075} is an apocalyptic number.

61515701550075 is a deficient number, since it is larger than the sum of its proper divisors (40893145082501).

61515701550075 is a wasteful number, since it uses less digits than its factorization.

61515701550075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881164 (or 3881159 counting only the distinct ones).

The product of its (nonzero) digits is 918750, while the sum is 48.

The spelling of 61515701550075 in words is "sixty-one trillion, five hundred fifteen billion, seven hundred one million, five hundred fifty thousand, seventy-five".