61155389 has 8 divisors (see below), whose sum is σ = 62357088. Its totient is φ = 59962320.

The previous prime is 61155383. The next prime is 61155491. The reversal of 61155389 is 98355116.

61155389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-61155389 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 (61155383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13199 + ... + 17219.

It is an arithmetic number, because the mean of its divisors is an integer number (7794636).

Almost surely, 2^61155389 is an apocalyptic number.

It is an amenable number.

61155389 is a deficient number, since it is larger than the sum of its proper divisors (1201699).

61155389 is a wasteful number, since it uses less digits than its factorization.

61155389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315.

The product of its digits is 32400, while the sum is 38.

The square root of 61155389 is about 7820.1911101967. The cubic root of 61155389 is about 393.9836908226.

The spelling of 61155389 in words is "sixty-one million, one hundred fifty-five thousand, three hundred eighty-nine".