61500501215 has 16 divisors (see below), whose sum is σ = 77744711520. Its totient is φ = 46574985600.

The previous prime is 61500501151. The next prime is 61500501221. The reversal of 61500501215 is 51210500516.

It is not a de Polignac number, because 61500501215 - 2⁶ = 61500501151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125204 + ... + 372393.

It is an arithmetic number, because the mean of its divisors is an integer number (4859044470).

Almost surely, 2^61500501215 is an apocalyptic number.

61500501215 is a deficient number, since it is larger than the sum of its proper divisors (16244210305).

61500501215 is a wasteful number, since it uses less digits than its factorization.

61500501215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498922.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 61500501215 in words is "sixty-one billion, five hundred million, five hundred one thousand, two hundred fifteen".