61011155 has 8 divisors (see below), whose sum is σ = 73273200. Its totient is φ = 48769056.

The previous prime is 61011151. The next prime is 61011161. The reversal of 61011155 is 55111016.

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 61011155 - 2² = 61011151 is a prime.

It is a super-2 number, since 2×61011155² = 7444722068868050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61011151) 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, 2876 + ... + 11414.

It is an arithmetic number, because the mean of its divisors is an integer number (9159150).

Almost surely, 2^61011155 is an apocalyptic number.

61011155 is a deficient number, since it is larger than the sum of its proper divisors (12262045).

61011155 is a wasteful number, since it uses less digits than its factorization.

61011155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9973.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 61011155 is about 7810.9637689596. The cubic root of 61011155 is about 393.6737122718.

The spelling of 61011155 in words is "sixty-one million, eleven thousand, one hundred fifty-five".