61164747 has 16 divisors (see below), whose sum is σ = 103559680. Its totient is φ = 34951176.

The previous prime is 61164713. The next prime is 61164749. The reversal of 61164747 is 74746116.

61164747 is a `hidden beast` number, since 6 + 1 + 1 + 647 + 4 + 7 = 666.

It is not a de Polignac number, because 61164747 - 2¹⁰ = 61163723 is a prime.

It is a super-2 number, since 2×61164747² = 7482252551148018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61164749) 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, 161623 + ... + 162000.

It is an arithmetic number, because the mean of its divisors is an integer number (6472480).

Almost surely, 2^61164747 is an apocalyptic number.

61164747 is a deficient number, since it is larger than the sum of its proper divisors (42394933).

61164747 is a wasteful number, since it uses less digits than its factorization.

61164747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323639 (or 323633 counting only the distinct ones).

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

The square root of 61164747 is about 7820.7894102833. The cubic root of 61164747 is about 394.0037855975.

The spelling of 61164747 in words is "sixty-one million, one hundred sixty-four thousand, seven hundred forty-seven".