61534755844 has 27 divisors (see below), whose sum is σ = 111299432853. Its totient is φ = 29767440000.

The previous prime is 61534755809. The next prime is 61534755901. The reversal of 61534755844 is 44855743516.

The square root of 61534755844 is 248062.

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., 2466314244 + 59068441600 = 49662^2 + 243040^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61534755791 and 61534755800.

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, 15377844 + ... + 15381844.

Almost surely, 2^61534755844 is an apocalyptic number.

61534755844 is the 248062-nd square number.

It is an amenable number.

61534755844 is a deficient number, since it is larger than the sum of its proper divisors (49764677009).

61534755844 is an frugal number, since it uses more digits than its factorization.

61534755844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8068 (or 4034 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 52.

The spelling of 61534755844 in words is "sixty-one billion, five hundred thirty-four million, seven hundred fifty-five thousand, eight hundred forty-four".