61007888550309 has 4 divisors (see below), whose sum is σ = 81343851400416. Its totient is φ = 40671925700204.

The previous prime is 61007888550289. The next prime is 61007888550341. The reversal of 61007888550309 is 90305588870016.

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 61007888550309 - 2¹⁹ = 61007888026021 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61007888557309) 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, 10167981425049 + ... + 10167981425054.

It is an arithmetic number, because the mean of its divisors is an integer number (20335962850104).

Almost surely, 2^{61007888550309} is an apocalyptic number.

It is an amenable number.

61007888550309 is a deficient number, since it is larger than the sum of its proper divisors (20335962850107).

61007888550309 is a wasteful number, since it uses less digits than its factorization.

61007888550309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20335962850106.

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 61007888550309 in words is "sixty-one trillion, seven billion, eight hundred eighty-eight million, five hundred fifty thousand, three hundred nine".