61515255251516 has 24 divisors (see below), whose sum is σ = 119092273937280. Its totient is φ = 27567656001200.

The previous prime is 61515255251501. The next prime is 61515255251531.

61515255251516 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (61515255251501) and next prime (61515255251531).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9845588306 + ... + 9845594553.

It is an arithmetic number, because the mean of its divisors is an integer number (4962178080720).

Almost surely, 2^{61515255251516} is an apocalyptic number.

It is an amenable number.

61515255251516 is a deficient number, since it is larger than the sum of its proper divisors (57577018685764).

61515255251516 is a wasteful number, since it uses less digits than its factorization.

61515255251516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19691182945 (or 19691182943 counting only the distinct ones).

The product of its digits is 2250000, while the sum is 50.

The spelling of 61515255251516 in words is "sixty-one trillion, five hundred fifteen billion, two hundred fifty-five million, two hundred fifty-one thousand, five hundred sixteen".