61649337 has 8 divisors (see below), whose sum is σ = 82261504. Its totient is φ = 41068368.

The previous prime is 61649267. The next prime is 61649431. The reversal of 61649337 is 73394616.

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

It is not a de Polignac number, because 61649337 - 2¹⁹ = 61125049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61649295 and 61649304.

It is not an unprimeable number, because it can be changed into a prime (61648337) 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, 2713 + ... + 11430.

It is an arithmetic number, because the mean of its divisors is an integer number (10282688).

Almost surely, 2^61649337 is an apocalyptic number.

It is an amenable number.

61649337 is a deficient number, since it is larger than the sum of its proper divisors (20612167).

61649337 is a wasteful number, since it uses less digits than its factorization.

61649337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15599.

The product of its digits is 81648, while the sum is 39.

The square root of 61649337 is about 7851.7091769882. The cubic root of 61649337 is about 395.0415744309.

The spelling of 61649337 in words is "sixty-one million, six hundred forty-nine thousand, three hundred thirty-seven".