61128461289 has 32 divisors (see below), whose sum is σ = 96520990720. Its totient is φ = 33686295552.

The previous prime is 61128461267. The next prime is 61128461291. The reversal of 61128461289 is 98216482116.

It is not a de Polignac number, because 61128461289 - 2⁸ = 61128461033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61128461249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357112 + ... + 499785.

It is an arithmetic number, because the mean of its divisors is an integer number (3016280960).

Almost surely, 2^61128461289 is an apocalyptic number.

It is an amenable number.

61128461289 is a deficient number, since it is larger than the sum of its proper divisors (35392529431).

61128461289 is a wasteful number, since it uses less digits than its factorization.

61128461289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857029.

The product of its digits is 331776, while the sum is 48.

The spelling of 61128461289 in words is "sixty-one billion, one hundred twenty-eight million, four hundred sixty-one thousand, two hundred eighty-nine".