61651155 has 32 divisors (see below), whose sum is σ = 104219136. Its totient is φ = 31057664.

The previous prime is 61651133. The next prime is 61651193. The reversal of 61651155 is 55115616.

It is a cyclic number.

It is not a de Polignac number, because 61651155 - 2⁵ = 61651123 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, 27559 + ... + 29711.

It is an arithmetic number, because the mean of its divisors is an integer number (3256848).

Almost surely, 2^61651155 is an apocalyptic number.

61651155 is a deficient number, since it is larger than the sum of its proper divisors (42567981).

61651155 is a wasteful number, since it uses less digits than its factorization.

61651155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267.

The product of its digits is 4500, while the sum is 30.

The square root of 61651155 is about 7851.8249471062. The cubic root of 61651155 is about 395.0454575682.

The spelling of 61651155 in words is "sixty-one million, six hundred fifty-one thousand, one hundred fifty-five".