61139464 has 32 divisors (see below), whose sum is σ = 117976320. Its totient is φ = 29687616.

The previous prime is 61139459. The next prime is 61139467. The reversal of 61139464 is 46493116.

It is not an unprimeable number, because it can be changed into a prime (61139467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76314 + ... + 77110.

It is an arithmetic number, because the mean of its divisors is an integer number (3686760).

Almost surely, 2^61139464 is an apocalyptic number.

It is an amenable number.

61139464 is a deficient number, since it is larger than the sum of its proper divisors (56836856).

61139464 is a wasteful number, since it uses less digits than its factorization.

61139464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1065 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 61139464 is about 7819.1728462798. The cubic root of 61139464 is about 393.9494897758.

The spelling of 61139464 in words is "sixty-one million, one hundred thirty-nine thousand, four hundred sixty-four".