61448647 has 4 divisors (see below), whose sum is σ = 66175480. Its totient is φ = 56721816.

The previous prime is 61448633. The next prime is 61448657. The reversal of 61448647 is 74684416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61448647 - 2¹⁹ = 60924359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61448657) 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, 2363397 + ... + 2363422.

It is an arithmetic number, because the mean of its divisors is an integer number (16543870).

Almost surely, 2^61448647 is an apocalyptic number.

61448647 is a deficient number, since it is larger than the sum of its proper divisors (4726833).

61448647 is a wasteful number, since it uses less digits than its factorization.

61448647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726832.

The product of its digits is 129024, while the sum is 40.

The square root of 61448647 is about 7838.9187392140. The cubic root of 61448647 is about 394.6124426007.

The spelling of 61448647 in words is "sixty-one million, four hundred forty-eight thousand, six hundred forty-seven".