61145933823748 has 6 divisors (see below), whose sum is σ = 107005384191566. Its totient is φ = 30572966911872.

The previous prime is 61145933823671. The next prime is 61145933823811. The reversal of 61145933823748 is 84732833954116.

It can be written as a sum of positive squares in only one way, i.e., 51867622878724 + 9278310945024 = 7201918^2 + 3046032^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61145933823748.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7643241727965 + ... + 7643241727972.

Almost surely, 2^{61145933823748} is an apocalyptic number.

It is an amenable number.

61145933823748 is a deficient number, since it is larger than the sum of its proper divisors (45859450367818).

61145933823748 is a wasteful number, since it uses less digits than its factorization.

61145933823748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15286483455941 (or 15286483455939 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 64.

The spelling of 61145933823748 in words is "sixty-one trillion, one hundred forty-five billion, nine hundred thirty-three million, eight hundred twenty-three thousand, seven hundred forty-eight".