61453560 has 128 divisors (see below), whose sum is σ = 212544000. Its totient is φ = 13923840.

The previous prime is 61453549. The next prime is 61453571. The reversal of 61453560 is 6535416.

It is an interprime number because it is at equal distance from previous prime (61453549) and next prime (61453571).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124915 + ... + 125405.

It is an arithmetic number, because the mean of its divisors is an integer number (1660500).

Almost surely, 2^61453560 is an apocalyptic number.

61453560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61453560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106272000).

61453560 is an abundant number, since it is smaller than the sum of its proper divisors (151090440).

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

61453560 is a wasteful number, since it uses less digits than its factorization.

61453560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 657 counting only the distinct ones).

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

The square root of 61453560 is about 7839.2321052511. The cubic root of 61453560 is about 394.6229591288.

Adding to 61453560 its reverse (6535416), we get a palindrome (67988976).

The spelling of 61453560 in words is "sixty-one million, four hundred fifty-three thousand, five hundred sixty".