61653450 has 48 divisors (see below), whose sum is σ = 154052640. Its totient is φ = 16317120.

The previous prime is 61653439. The next prime is 61653457. The reversal of 61653450 is 5435616.

61653450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61653450² = 7602295793805000, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61653457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19372 + ... + 22328.

It is an arithmetic number, because the mean of its divisors is an integer number (3209430).

Almost surely, 2^61653450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61653450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77026320).

61653450 is an abundant number, since it is smaller than the sum of its proper divisors (92399190).

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

61653450 is a wasteful number, since it uses less digits than its factorization.

61653450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111 (or 3106 counting only the distinct ones).

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

The square root of 61653450 is about 7851.9710901149. The cubic root of 61653450 is about 395.0503594395.

The spelling of 61653450 in words is "sixty-one million, six hundred fifty-three thousand, four hundred fifty".