61129636645875 has 32 divisors (see below), whose sum is σ = 116251103294976. Its totient is φ = 27944976751200.

The previous prime is 61129636645853. The next prime is 61129636645967. The reversal of 61129636645875 is 57854663692116.

It is not a de Polignac number, because 61129636645875 - 2⁵ = 61129636645843 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11643737689 + ... + 11643742938.

It is an arithmetic number, because the mean of its divisors is an integer number (3632846977968).

Almost surely, 2^{61129636645875} is an apocalyptic number.

61129636645875 is a deficient number, since it is larger than the sum of its proper divisors (55121466649101).

61129636645875 is a wasteful number, since it uses less digits than its factorization.

61129636645875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23287480652 (or 23287480642 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 69.

The spelling of 61129636645875 in words is "sixty-one trillion, one hundred twenty-nine billion, six hundred thirty-six million, six hundred forty-five thousand, eight hundred seventy-five".