61500501247 has 8 divisors (see below), whose sum is σ = 63750021120. Its totient is φ = 59267583480.

The previous prime is 61500501229. The next prime is 61500501259. The reversal of 61500501247 is 74210500516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61500501247 - 2²⁷ = 61366283519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61500501287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4142983 + ... + 4157800.

It is an arithmetic number, because the mean of its divisors is an integer number (7968752640).

Almost surely, 2^61500501247 is an apocalyptic number.

61500501247 is a deficient number, since it is larger than the sum of its proper divisors (2249519873).

61500501247 is a wasteful number, since it uses less digits than its factorization.

61500501247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8301053.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 61500501247 in words is "sixty-one billion, five hundred million, five hundred one thousand, two hundred forty-seven".