61545155 has 8 divisors (see below), whose sum is σ = 84404832. Its totient is φ = 42202368.

The previous prime is 61545139. The next prime is 61545167. The reversal of 61545155 is 55154516.

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 61545155 - 2⁴ = 61545139 is a prime.

It is a super-2 number, since 2×61545155² = 7575612207948050, which contains 22 as substring.

It is a Duffinian number.

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, 879182 + ... + 879251.

It is an arithmetic number, because the mean of its divisors is an integer number (10550604).

Almost surely, 2^61545155 is an apocalyptic number.

61545155 is a deficient number, since it is larger than the sum of its proper divisors (22859677).

61545155 is a wasteful number, since it uses less digits than its factorization.

61545155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758445.

The product of its digits is 15000, while the sum is 32.

The square root of 61545155 is about 7845.0720200646. The cubic root of 61545155 is about 394.8189203653.

The spelling of 61545155 in words is "sixty-one million, five hundred forty-five thousand, one hundred fifty-five".