61385611 has 16 divisors (see below), whose sum is σ = 72693760. Its totient is φ = 50725440.

The previous prime is 61385609. The next prime is 61385629. The reversal of 61385611 is 11658316.

61385611 = T₆₆ + T₆₇ + ... + T₇₁₆.

It is a cyclic number.

It is not a de Polignac number, because 61385611 - 2¹ = 61385609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (61385411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98860 + ... + 99478.

It is an arithmetic number, because the mean of its divisors is an integer number (4543360).

Almost surely, 2^61385611 is an apocalyptic number.

61385611 is a deficient number, since it is larger than the sum of its proper divisors (11308149).

61385611 is a wasteful number, since it uses less digits than its factorization.

61385611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114.

The product of its digits is 4320, while the sum is 31.

The square root of 61385611 is about 7834.8969999611. The cubic root of 61385611 is about 394.4774610523.

The spelling of 61385611 in words is "sixty-one million, three hundred eighty-five thousand, six hundred eleven".