61155149 has 8 divisors (see below), whose sum is σ = 68342400. Its totient is φ = 54239200.

The previous prime is 61155139. The next prime is 61155161. The reversal of 61155149 is 94155116.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61155149 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 (61155109) 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, 67349 + ... + 68250.

It is an arithmetic number, because the mean of its divisors is an integer number (8542800).

Almost surely, 2^61155149 is an apocalyptic number.

It is an amenable number.

61155149 is a deficient number, since it is larger than the sum of its proper divisors (7187251).

61155149 is a wasteful number, since it uses less digits than its factorization.

61155149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135651.

The product of its digits is 5400, while the sum is 32.

The square root of 61155149 is about 7820.1757652881. The cubic root of 61155149 is about 393.9831754349.

The spelling of 61155149 in words is "sixty-one million, one hundred fifty-five thousand, one hundred forty-nine".