61121756355 has 32 divisors (see below), whose sum is σ = 112300266240. Its totient is φ = 28075063680.

The previous prime is 61121756287. The next prime is 61121756413. The reversal of 61121756355 is 55365712116.

It is not a de Polignac number, because 61121756355 - 2⁹ = 61121755843 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, 9745152 + ... + 9751421.

It is an arithmetic number, because the mean of its divisors is an integer number (3509383320).

Almost surely, 2^61121756355 is an apocalyptic number.

61121756355 is a deficient number, since it is larger than the sum of its proper divisors (51178509885).

61121756355 is a wasteful number, since it uses less digits than its factorization.

61121756355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19496611.

The product of its digits is 189000, while the sum is 42.

The spelling of 61121756355 in words is "sixty-one billion, one hundred twenty-one million, seven hundred fifty-six thousand, three hundred fifty-five".