651610111651 has 4 divisors (see below), whose sum is σ = 672629792704. Its totient is φ = 630590430600.

The previous prime is 651610111583. The next prime is 651610111657. The reversal of 651610111651 is 156111016156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 651610111651 - 2¹¹ = 651610109603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651610111657) 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, 10509840480 + ... + 10509840541.

It is an arithmetic number, because the mean of its divisors is an integer number (168157448176).

Almost surely, 2^651610111651 is an apocalyptic number.

651610111651 is a deficient number, since it is larger than the sum of its proper divisors (21019681053).

651610111651 is a wasteful number, since it uses less digits than its factorization.

651610111651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21019681052.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 651610111651 in words is "six hundred fifty-one billion, six hundred ten million, one hundred eleven thousand, six hundred fifty-one".