61501872533 has 4 divisors (see below), whose sum is σ = 61971352608. Its totient is φ = 61032392460.

The previous prime is 61501872473. The next prime is 61501872569. The reversal of 61501872533 is 33527810516.

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 61501872533 - 2¹⁶ = 61501806997 is a prime.

It is a super-3 number, since 3×61501872533³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61501872233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234739841 + ... + 234740102.

It is an arithmetic number, because the mean of its divisors is an integer number (15492838152).

Almost surely, 2^61501872533 is an apocalyptic number.

It is an amenable number.

61501872533 is a deficient number, since it is larger than the sum of its proper divisors (469480075).

61501872533 is a wasteful number, since it uses less digits than its factorization.

61501872533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469480074.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 61501872533 in words is "sixty-one billion, five hundred one million, eight hundred seventy-two thousand, five hundred thirty-three".