61500388333145 has 4 divisors (see below), whose sum is σ = 73800465999780. Its totient is φ = 49200310666512.

The previous prime is 61500388333141. The next prime is 61500388333157. The reversal of 61500388333145 is 54133388300516.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40816011565081 + 20684376768064 = 6388741^2 + 4548008^2 .

It is a cyclic number.

It is not a de Polignac number, because 61500388333145 - 2² = 61500388333141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61500388333093 and 61500388333102.

It is not an unprimeable number, because it can be changed into a prime (61500388333141) 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, 6150038833310 + ... + 6150038833319.

It is an arithmetic number, because the mean of its divisors is an integer number (18450116499945).

Almost surely, 2^{61500388333145} is an apocalyptic number.

It is an amenable number.

61500388333145 is a deficient number, since it is larger than the sum of its proper divisors (12300077666635).

61500388333145 is a wasteful number, since it uses less digits than its factorization.

61500388333145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12300077666634.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 61500388333145 in words is "sixty-one trillion, five hundred billion, three hundred eighty-eight million, three hundred thirty-three thousand, one hundred forty-five".