61411640 has 16 divisors (see below), whose sum is σ = 138176280. Its totient is φ = 24564640.

The previous prime is 61411631. The next prime is 61411661. The reversal of 61411640 is 4611416.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 767606 + ... + 767685.

Almost surely, 2^61411640 is an apocalyptic number.

It is an amenable number.

61411640 is an abundant number, since it is smaller than the sum of its proper divisors (76764640).

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

61411640 is a wasteful number, since it uses less digits than its factorization.

61411640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535302 (or 1535298 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 61411640 is about 7836.5579178616. The cubic root of 61411640 is about 394.5332092031.

The spelling of 61411640 in words is "sixty-one million, four hundred eleven thousand, six hundred forty".