65616561357 has 8 divisors (see below), whose sum is σ = 87564764160. Its totient is φ = 43706366400.

The previous prime is 65616561323. The next prime is 65616561371. The reversal of 65616561357 is 75316561656.

65616561357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 65616561357 - 2⁶ = 65616561293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65616561377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9497932 + ... + 9504837.

It is an arithmetic number, because the mean of its divisors is an integer number (10945595520).

Almost surely, 2^65616561357 is an apocalyptic number.

It is an amenable number.

65616561357 is a deficient number, since it is larger than the sum of its proper divisors (21948202803).

65616561357 is a wasteful number, since it uses less digits than its factorization.

65616561357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19003923.

The product of its digits is 3402000, while the sum is 51.

The spelling of 65616561357 in words is "sixty-five billion, six hundred sixteen million, five hundred sixty-one thousand, three hundred fifty-seven".