61311702544 has 45 divisors (see below), whose sum is σ = 120155861709. Its totient is φ = 30307708800.

The previous prime is 61311702533. The next prime is 61311702593. The reversal of 61311702544 is 44520711316.

The square root of 61311702544 is 247612.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 51534448144 + 9777254400 = 227012^2 + 98880^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 102015844 + ... + 102016444.

Almost surely, 2^61311702544 is an apocalyptic number.

61311702544 is the 247612-nd square number.

It is an amenable number.

61311702544 is a deficient number, since it is larger than the sum of its proper divisors (58844159165).

61311702544 is an frugal number, since it uses more digits than its factorization.

61311702544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 61311702544 in words is "sixty-one billion, three hundred eleven million, seven hundred two thousand, five hundred forty-four".