61005155 has 8 divisors (see below), whose sum is σ = 73332000. Its totient is φ = 48720256.

The previous prime is 61005137. The next prime is 61005211. The reversal of 61005155 is 55150016.

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 61005155 - 2⁸ = 61004899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61005155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7190 + ... + 13179.

It is an arithmetic number, because the mean of its divisors is an integer number (9166500).

Almost surely, 2^61005155 is an apocalyptic number.

61005155 is a deficient number, since it is larger than the sum of its proper divisors (12326845).

61005155 is a wasteful number, since it uses less digits than its factorization.

61005155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20973.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 61005155 is about 7810.5796839927. The cubic root of 61005155 is about 393.6608068738.

The spelling of 61005155 in words is "sixty-one million, five thousand, one hundred fifty-five".