61511000351513 has 4 divisors (see below), whose sum is σ = 64185391671168. Its totient is φ = 58836609031860.

The previous prime is 61511000351461. The next prime is 61511000351569. The reversal of 61511000351513 is 31515300011516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61511000351513 - 2¹⁰ = 61511000350489 is a prime.

It is a super-2 number, since 2×61511000351513² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61511000351513.

It is not an unprimeable number, because it can be changed into a prime (61511000353513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1337195659793 + ... + 1337195659838.

It is an arithmetic number, because the mean of its divisors is an integer number (16046347917792).

Almost surely, 2^{61511000351513} is an apocalyptic number.

It is an amenable number.

61511000351513 is a deficient number, since it is larger than the sum of its proper divisors (2674391319655).

61511000351513 is a wasteful number, since it uses less digits than its factorization.

61511000351513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674391319654.

The product of its (nonzero) digits is 6750, while the sum is 32.

It can be divided in two parts, 615110003 and 51513, that added together give a palindrome (615161516).

The spelling of 61511000351513 in words is "sixty-one trillion, five hundred eleven billion, three hundred fifty-one thousand, five hundred thirteen".