61867161 has 24 divisors (see below), whose sum is σ = 91054080. Its totient is φ = 40473216.

The previous prime is 61867159. The next prime is 61867163. The reversal of 61867161 is 16176816.

It is an interprime number because it is at equal distance from previous prime (61867159) and next prime (61867163).

It is not a de Polignac number, because 61867161 - 2¹ = 61867159 is a prime.

It is a super-2 number, since 2×61867161² = 7655091220399842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61867163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128920 + ... + 129398.

It is an arithmetic number, because the mean of its divisors is an integer number (3793920).

Almost surely, 2^61867161 is an apocalyptic number.

It is an amenable number.

61867161 is a deficient number, since it is larger than the sum of its proper divisors (29186919).

61867161 is a wasteful number, since it uses less digits than its factorization.

61867161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 722 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 61867161 is about 7865.5680659441. The cubic root of 61867161 is about 395.5062909119.

The spelling of 61867161 in words is "sixty-one million, eight hundred sixty-seven thousand, one hundred sixty-one".