61720378 has 8 divisors (see below), whose sum is σ = 93430260. Its totient is φ = 30576960.

The previous prime is 61720369. The next prime is 61720397. The reversal of 61720378 is 87302716.

It can be written as a sum of positive squares in 2 ways, for example, as 60886809 + 833569 = 7803^2 + 913^2 .

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

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, 141343 + ... + 141778.

Almost surely, 2^61720378 is an apocalyptic number.

61720378 is a deficient number, since it is larger than the sum of its proper divisors (31709882).

61720378 is a wasteful number, since it uses less digits than its factorization.

61720378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283232.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 61720378 is about 7856.2317939328. The cubic root of 61720378 is about 395.1932569249.

The spelling of 61720378 in words is "sixty-one million, seven hundred twenty thousand, three hundred seventy-eight".