61536340 has 12 divisors (see below), whose sum is σ = 129226356. Its totient is φ = 24614528.

The previous prime is 61536331. The next prime is 61536341. The reversal of 61536340 is 4363516.

It can be written as a sum of positive squares in 2 ways, for example, as 46185616 + 15350724 = 6796^2 + 3918^2 .

It is a super-2 number, since 2×61536340² = 7573442281191200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61536299 and 61536308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61536341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538389 + ... + 1538428.

It is an arithmetic number, because the mean of its divisors is an integer number (10768863).

Almost surely, 2^61536340 is an apocalyptic number.

It is an amenable number.

61536340 is an abundant number, since it is smaller than the sum of its proper divisors (67690016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61536340 is a wasteful number, since it uses less digits than its factorization.

61536340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076826 (or 3076824 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 61536340 is about 7844.5101822867. The cubic root of 61536340 is about 394.8000697346.

Adding to 61536340 its reverse (4363516), we get a palindrome (65899856).

The spelling of 61536340 in words is "sixty-one million, five hundred thirty-six thousand, three hundred forty".