61201644 has 96 divisors (see below), whose sum is σ = 169827840. Its totient is φ = 16793088.

The previous prime is 61201631. The next prime is 61201669. The reversal of 61201644 is 44610216.

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, 262552 + ... + 262784.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^61201644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61201644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84913920).

61201644 is an abundant number, since it is smaller than the sum of its proper divisors (108626196).

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

61201644 is a wasteful number, since it uses less digits than its factorization.

61201644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 61201644 is about 7823.1479597410. The cubic root of 61201644 is about 394.0829959061.

The spelling of 61201644 in words is "sixty-one million, two hundred one thousand, six hundred forty-four".