61452640 has 24 divisors (see below), whose sum is σ = 145182240. Its totient is φ = 24580992.

The previous prime is 61452617. The next prime is 61452647. The reversal of 61452640 is 4625416.

It is a junction number, because it is equal to n+sod(n) for n = 61452599 and 61452608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61452647) 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, 191880 + ... + 192199.

It is an arithmetic number, because the mean of its divisors is an integer number (6049260).

Almost surely, 2^61452640 is an apocalyptic number.

It is an amenable number.

61452640 is an abundant number, since it is smaller than the sum of its proper divisors (83729600).

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

61452640 is a wasteful number, since it uses less digits than its factorization.

61452640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384094 (or 384086 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61452640 is about 7839.1734258147. The cubic root of 61452640 is about 394.6209898643.

The spelling of 61452640 in words is "sixty-one million, four hundred fifty-two thousand, six hundred forty".