61601532320 has 48 divisors (see below), whose sum is σ = 145658344608. Its totient is φ = 24619495680.

The previous prime is 61601532319. The next prime is 61601532341. The reversal of 61601532320 is 2323510616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22967 + ... + 351753.

It is an arithmetic number, because the mean of its divisors is an integer number (3034548846).

Almost surely, 2^61601532320 is an apocalyptic number.

It is an amenable number.

61601532320 is an abundant number, since it is smaller than the sum of its proper divisors (84056812288).

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

61601532320 is a wasteful number, since it uses less digits than its factorization.

61601532320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329973 (or 329965 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 61601532320 in words is "sixty-one billion, six hundred one million, five hundred thirty-two thousand, three hundred twenty".