651556061 has 16 divisors (see below), whose sum is σ = 710760960. Its totient is φ = 593688960.

The previous prime is 651556043. The next prime is 651556069. The reversal of 651556061 is 160655156.

It is a cyclic number.

It is not a de Polignac number, because 651556061 - 2⁶ = 651555997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651556069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576545 + ... + 577673.

It is an arithmetic number, because the mean of its divisors is an integer number (44422560).

Almost surely, 2^651556061 is an apocalyptic number.

It is an amenable number.

651556061 is a deficient number, since it is larger than the sum of its proper divisors (59204899).

651556061 is a wasteful number, since it uses less digits than its factorization.

651556061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 651556061 is about 25525.5961928414. The cubic root of 651556061 is about 866.9297959577.

The spelling of 651556061 in words is "six hundred fifty-one million, five hundred fifty-six thousand, sixty-one".