61532163 has 64 divisors (see below), whose sum is σ = 120407040. Its totient is φ = 30067200.

The previous prime is 61532143. The next prime is 61532173. The reversal of 61532163 is 36123516.

61532163 is a `hidden beast` number, since 615 + 32 + 16 + 3 = 666.

It is not a de Polignac number, because 61532163 - 2⁵ = 61532131 is a prime.

It is a super-3 number, since 3×61532163³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (61532123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34473 + ... + 36213.

It is an arithmetic number, because the mean of its divisors is an integer number (1881360).

Almost surely, 2^61532163 is an apocalyptic number.

61532163 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61532163 is a deficient number, since it is larger than the sum of its proper divisors (58874877).

61532163 is a wasteful number, since it uses less digits than its factorization.

61532163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785 (or 1779 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 61532163 is about 7844.2439406230. The cubic root of 61532163 is about 394.7911367085.

Adding to 61532163 its reverse (36123516), we get a palindrome (97655679).

The spelling of 61532163 in words is "sixty-one million, five hundred thirty-two thousand, one hundred sixty-three".