61536450 has 24 divisors (see below), whose sum is σ = 152610768. Its totient is φ = 16409680.

The previous prime is 61536443. The next prime is 61536451. The reversal of 61536450 is 5463516.

It is a super-3 number, since 3×61536450³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (61536451) 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, 204972 + ... + 205271.

It is an arithmetic number, because the mean of its divisors is an integer number (6358782).

Almost surely, 2^61536450 is an apocalyptic number.

61536450 is an abundant number, since it is smaller than the sum of its proper divisors (91074318).

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

61536450 is a wasteful number, since it uses less digits than its factorization.

61536450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410258 (or 410253 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 61536450 is about 7844.5171935563. The cubic root of 61536450 is about 394.8003049776.

Adding to 61536450 its reverse (5463516), we get a palindrome (66999966).

The spelling of 61536450 in words is "sixty-one million, five hundred thirty-six thousand, four hundred fifty".