651561520106 has 16 divisors (see below), whose sum is σ = 1118516117760. Its totient is φ = 278852273520.

The previous prime is 651561520091. The next prime is 651561520121. The reversal of 651561520106 is 601025165156.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (651561520091) and next prime (651561520121).

It is a self number, because there is not a number n which added to its sum of digits gives 651561520106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32354405 + ... + 32374536.

It is an arithmetic number, because the mean of its divisors is an integer number (69907257360).

Almost surely, 2^651561520106 is an apocalyptic number.

651561520106 is a deficient number, since it is larger than the sum of its proper divisors (466954597654).

651561520106 is a wasteful number, since it uses less digits than its factorization.

651561520106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64729669.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 651561520106 in words is "six hundred fifty-one billion, five hundred sixty-one million, five hundred twenty thousand, one hundred six".