61671744 has 42 divisors (see below), whose sum is σ = 176772570. Its totient is φ = 20557056.

The previous prime is 61671721. The next prime is 61671751. The reversal of 61671744 is 44717616.

It can be written as a sum of positive squares in only one way, i.e., 60840000 + 831744 = 7800^2 + 912^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 61671699 and 61671708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52959 + ... + 54110.

Almost surely, 2^61671744 is an apocalyptic number.

61671744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61671744 is an abundant number, since it is smaller than the sum of its proper divisors (115100826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61671744 is a wasteful number, since it uses less digits than its factorization.

61671744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107087 (or 107074 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 61671744 is about 7853.1359341348. The cubic root of 61671744 is about 395.0894290919.

The spelling of 61671744 in words is "sixty-one million, six hundred seventy-one thousand, seven hundred forty-four".