61550516615619 has 4 divisors (see below), whose sum is σ = 82067355487496. Its totient is φ = 41033677743744.

The previous prime is 61550516615591. The next prime is 61550516615677. The reversal of 61550516615619 is 91651661505516.

It is a happy number.

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

It is not a de Polignac number, because 61550516615619 - 2¹³ = 61550516607427 is a prime.

It is a super-2 number, since 2×61550516615619² (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 (61550516615689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10258419435934 + ... + 10258419435939.

It is an arithmetic number, because the mean of its divisors is an integer number (20516838871874).

Almost surely, 2^{61550516615619} is an apocalyptic number.

61550516615619 is a deficient number, since it is larger than the sum of its proper divisors (20516838871877).

61550516615619 is a wasteful number, since it uses less digits than its factorization.

61550516615619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20516838871876.

The product of its (nonzero) digits is 7290000, while the sum is 57.

The spelling of 61550516615619 in words is "sixty-one trillion, five hundred fifty billion, five hundred sixteen million, six hundred fifteen thousand, six hundred nineteen".