61317378 has 32 divisors (see below), whose sum is σ = 137349120. Its totient is φ = 20275920.

The previous prime is 61317367. The next prime is 61317409. The reversal of 61317378 is 87371316.

61317378 is a `hidden beast` number, since 613 + 1 + 7 + 37 + 8 = 666.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2388 + ... + 11328.

It is an arithmetic number, because the mean of its divisors is an integer number (4292160).

Almost surely, 2^61317378 is an apocalyptic number.

61317378 is an abundant number, since it is smaller than the sum of its proper divisors (76031742).

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

61317378 is a wasteful number, since it uses less digits than its factorization.

61317378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9079 (or 9073 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 61317378 is about 7830.5413605957. The cubic root of 61317378 is about 394.3312467670.

The spelling of 61317378 in words is "sixty-one million, three hundred seventeen thousand, three hundred seventy-eight".