61015117755 has 32 divisors (see below), whose sum is σ = 101217466368. Its totient is φ = 31352889600.

The previous prime is 61015117739. The next prime is 61015117759. The reversal of 61015117755 is 55771151016.

It is not a de Polignac number, because 61015117755 - 2⁴ = 61015117739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61015117759) 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, 183466 + ... + 394575.

It is an arithmetic number, because the mean of its divisors is an integer number (3163045824).

Almost surely, 2^61015117755 is an apocalyptic number.

61015117755 is a deficient number, since it is larger than the sum of its proper divisors (40202348613).

61015117755 is a wasteful number, since it uses less digits than its factorization.

61015117755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578307.

The product of its (nonzero) digits is 36750, while the sum is 39.

The spelling of 61015117755 in words is "sixty-one billion, fifteen million, one hundred seventeen thousand, seven hundred fifty-five".