61551011155111 has 8 divisors (see below), whose sum is σ = 61858961154144. Its totient is φ = 61243726995360.

The previous prime is 61551011155103. The next prime is 61551011155163. The reversal of 61551011155111 is 11155111015516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61551011155111 - 2³ = 61551011155103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551011155171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166274476 + ... + 166644241.

It is an arithmetic number, because the mean of its divisors is an integer number (7732370144268).

Almost surely, 2^{61551011155111} is an apocalyptic number.

61551011155111 is a deficient number, since it is larger than the sum of its proper divisors (307949999033).

61551011155111 is a wasteful number, since it uses less digits than its factorization.

61551011155111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332919641.

The product of its (nonzero) digits is 3750, while the sum is 34.

The spelling of 61551011155111 in words is "sixty-one trillion, five hundred fifty-one billion, eleven million, one hundred fifty-five thousand, one hundred eleven".