61643460 has 24 divisors (see below), whose sum is σ = 172601856. Its totient is φ = 16438240.

The previous prime is 61643423. The next prime is 61643471. The reversal of 61643460 is 6434616.

61643460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 513636 + ... + 513755.

It is an arithmetic number, because the mean of its divisors is an integer number (7191744).

Almost surely, 2^61643460 is an apocalyptic number.

61643460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61643460 is an abundant number, since it is smaller than the sum of its proper divisors (110958396).

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

61643460 is a wasteful number, since it uses less digits than its factorization.

61643460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027403 (or 1027401 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 61643460 is about 7851.3349183435. The cubic root of 61643460 is about 395.0290209944.

The spelling of 61643460 in words is "sixty-one million, six hundred forty-three thousand, four hundred sixty".