61520360533 has 4 divisors (see below), whose sum is σ = 61529269248. Its totient is φ = 61511451820.

The previous prime is 61520360519. The next prime is 61520360567. The reversal of 61520360533 is 33506302516.

61520360533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61520360533 - 2⁵ = 61520360501 is a prime.

It is a super-2 number, since 2×61520360533² (a number of 22 digits) contains 22 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 (61520360513) 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, 4443991 + ... + 4457812.

It is an arithmetic number, because the mean of its divisors is an integer number (15382317312).

Almost surely, 2^61520360533 is an apocalyptic number.

It is an amenable number.

61520360533 is a deficient number, since it is larger than the sum of its proper divisors (8908715).

61520360533 is an equidigital number, since it uses as much as digits as its factorization.

61520360533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8908714.

The product of its (nonzero) digits is 48600, while the sum is 34.

The spelling of 61520360533 in words is "sixty-one billion, five hundred twenty million, three hundred sixty thousand, five hundred thirty-three".