61516226556443 has 4 divisors (see below), whose sum is σ = 61516243914168. Its totient is φ = 61516209198720.

The previous prime is 61516226556427. The next prime is 61516226556461. The reversal of 61516226556443 is 34465562261516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61516226556443 - 2⁴ = 61516226556427 is a prime.

It is a super-2 number, since 2×61516226556443² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61516226556943) 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, 1234118 + ... + 11160443.

It is an arithmetic number, because the mean of its divisors is an integer number (15379060978542).

Almost surely, 2^{61516226556443} is an apocalyptic number.

61516226556443 is a deficient number, since it is larger than the sum of its proper divisors (17357725).

61516226556443 is a wasteful number, since it uses less digits than its factorization.

61516226556443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17357724.

The product of its digits is 31104000, while the sum is 56.

The spelling of 61516226556443 in words is "sixty-one trillion, five hundred sixteen billion, two hundred twenty-six million, five hundred fifty-six thousand, four hundred forty-three".