61166655055155 has 64 divisors (see below), whose sum is σ = 108797014609920. Its totient is φ = 29140809868800.

The previous prime is 61166655055111. The next prime is 61166655055157. The reversal of 61166655055155 is 55155055666116.

It is not a de Polignac number, because 61166655055155 - 2⁶ = 61166655055091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61166655055095 and 61166655055104.

It is not an unprimeable number, because it can be changed into a prime (61166655055157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 412019481 + ... + 412167909.

It is an arithmetic number, because the mean of its divisors is an integer number (1699953353280).

Almost surely, 2^{61166655055155} is an apocalyptic number.

61166655055155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61166655055155 is a deficient number, since it is larger than the sum of its proper divisors (47630359554765).

61166655055155 is a wasteful number, since it uses less digits than its factorization.

61166655055155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216652.

The product of its (nonzero) digits is 20250000, while the sum is 57.

The spelling of 61166655055155 in words is "sixty-one trillion, one hundred sixty-six billion, six hundred fifty-five million, fifty-five thousand, one hundred fifty-five".