210745640651 has 16 divisors (see below), whose sum is σ = 259390220544. Its totient is φ = 166736751264.

The previous prime is 210745640591. The next prime is 210745640659. The reversal of 210745640651 is 156046547012.

It is a cyclic number.

It is not a de Polignac number, because 210745640651 - 2³⁰ = 209671898827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210745640599 and 210745640608.

It is not an unprimeable number, because it can be changed into a prime (210745640659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3600320 + ... + 3658386.

It is an arithmetic number, because the mean of its divisors is an integer number (16211888784).

Almost surely, 2^210745640651 is an apocalyptic number.

210745640651 is a deficient number, since it is larger than the sum of its proper divisors (48644579893).

210745640651 is a wasteful number, since it uses less digits than its factorization.

210745640651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97970.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 210745640651 in words is "two hundred ten billion, seven hundred forty-five million, six hundred forty thousand, six hundred fifty-one".