61356552385 has 8 divisors (see below), whose sum is σ = 74455142760. Its totient is φ = 48533721984.

The previous prime is 61356552373. The next prime is 61356552391. The reversal of 61356552385 is 58325565316.

It can be written as a sum of positive squares in 4 ways, for example, as 16345111104 + 45011441281 = 127848^2 + 212159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61356552385 - 2⁵ = 61356552353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68939502 + ... + 68940391.

It is an arithmetic number, because the mean of its divisors is an integer number (9306892845).

Almost surely, 2^61356552385 is an apocalyptic number.

It is an amenable number.

61356552385 is a deficient number, since it is larger than the sum of its proper divisors (13098590375).

61356552385 is a wasteful number, since it uses less digits than its factorization.

61356552385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137879987.

The product of its digits is 3240000, while the sum is 49.

The spelling of 61356552385 in words is "sixty-one billion, three hundred fifty-six million, five hundred fifty-two thousand, three hundred eighty-five".