61361352511 has 16 divisors (see below), whose sum is σ = 65990181600. Its totient is φ = 56885925888.

The previous prime is 61361352509. The next prime is 61361352551. The reversal of 61361352511 is 11525316316.

It is a cyclic number.

It is not a de Polignac number, because 61361352511 - 2¹ = 61361352509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61361352551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23020 + ... + 351073.

It is an arithmetic number, because the mean of its divisors is an integer number (4124386350).

Almost surely, 2^61361352511 is an apocalyptic number.

61361352511 is a deficient number, since it is larger than the sum of its proper divisors (4628829089).

61361352511 is a wasteful number, since it uses less digits than its factorization.

61361352511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374298.

The product of its digits is 16200, while the sum is 34.

Adding to 61361352511 its reverse (11525316316), we get a palindrome (72886668827).

The spelling of 61361352511 in words is "sixty-one billion, three hundred sixty-one million, three hundred fifty-two thousand, five hundred eleven".