61781134 has 8 divisors (see below), whose sum is σ = 93189960. Its totient is φ = 30717816.

The previous prime is 61781129. The next prime is 61781177. The reversal of 61781134 is 43118716.

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

It is a junction number, because it is equal to n+sod(n) for n = 61781096 and 61781105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85929 + ... + 86644.

It is an arithmetic number, because the mean of its divisors is an integer number (11648745).

Almost surely, 2^61781134 is an apocalyptic number.

61781134 is a deficient number, since it is larger than the sum of its proper divisors (31408826).

61781134 is a wasteful number, since it uses less digits than its factorization.

61781134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172754.

The product of its digits is 4032, while the sum is 31.

The square root of 61781134 is about 7860.0975820915. The cubic root of 61781134 is about 395.3228871929.

The spelling of 61781134 in words is "sixty-one million, seven hundred eighty-one thousand, one hundred thirty-four".