205507672651 has 8 divisors (see below), whose sum is σ = 211604524560. Its totient is φ = 199439378208.

The previous prime is 205507672633. The next prime is 205507672679. The reversal of 205507672651 is 156276705502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205507672651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205507672691) 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, 7124761 + ... + 7153546.

It is an arithmetic number, because the mean of its divisors is an integer number (26450565570).

Almost surely, 2^205507672651 is an apocalyptic number.

205507672651 is a deficient number, since it is larger than the sum of its proper divisors (6096851909).

205507672651 is a wasteful number, since it uses less digits than its factorization.

205507672651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14278733.

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 205507672651 in words is "two hundred five billion, five hundred seven million, six hundred seventy-two thousand, six hundred fifty-one".