61161651 has 12 divisors (see below), whose sum is σ = 88590112. Its totient is φ = 40661136.

The previous prime is 61161649. The next prime is 61161671. The reversal of 61161651 is 15616116.

61161651 is a `hidden beast` number, since 6 + 1 + 1 + 6 + 1 + 651 = 666.

It is not a de Polignac number, because 61161651 - 2¹ = 61161649 is a prime.

It is a super-3 number, since 3×61161651³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61161671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5956 + ... + 12561.

Almost surely, 2^61161651 is an apocalyptic number.

61161651 is a deficient number, since it is larger than the sum of its proper divisors (27428461).

61161651 is a wasteful number, since it uses less digits than its factorization.

61161651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18890 (or 18887 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 61161651 is about 7820.5914737953. The cubic root of 61161651 is about 393.9971376706.

Adding to 61161651 its reverse (15616116), we get a palindrome (76777767).

The spelling of 61161651 in words is "sixty-one million, one hundred sixty-one thousand, six hundred fifty-one".