61449999580240 has 80 divisors (see below), whose sum is σ = 146318691093696. Its totient is φ = 23987867904000.

The previous prime is 61449999580217. The next prime is 61449999580253. The reversal of 61449999580240 is 4208599994416.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×61449999580240² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61449999580240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3599161 + ... + 11655640.

Almost surely, 2^{61449999580240} is an apocalyptic number.

It is an amenable number.

61449999580240 is an abundant number, since it is smaller than the sum of its proper divisors (84868691513456).

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

61449999580240 is a wasteful number, since it uses less digits than its factorization.

61449999580240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15256028 (or 15256022 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 70.

The spelling of 61449999580240 in words is "sixty-one trillion, four hundred forty-nine billion, nine hundred ninety-nine million, five hundred eighty thousand, two hundred forty".