61078149 has 12 divisors (see below), whose sum is σ = 96244512. Its totient is φ = 37017000.

The previous prime is 61078111. The next prime is 61078177. The reversal of 61078149 is 94187016.

It is not a de Polignac number, because 61078149 - 2¹² = 61074053 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61078109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308377 + ... + 308574.

It is an arithmetic number, because the mean of its divisors is an integer number (8020376).

Almost surely, 2^61078149 is an apocalyptic number.

It is an amenable number.

61078149 is a deficient number, since it is larger than the sum of its proper divisors (35166363).

61078149 is a wasteful number, since it uses less digits than its factorization.

61078149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616968 (or 616965 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 61078149 is about 7815.2510516298. The cubic root of 61078149 is about 393.8177522113.

The spelling of 61078149 in words is "sixty-one million, seventy-eight thousand, one hundred forty-nine".