651610061501 has 4 divisors (see below), whose sum is σ = 744697213152. Its totient is φ = 558522909852.

The previous prime is 651610061471. The next prime is 651610061503. The reversal of 651610061501 is 105160016156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 651610061501 - 2¹⁴ = 651610045117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651610061503) 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, 46543575815 + ... + 46543575828.

It is an arithmetic number, because the mean of its divisors is an integer number (186174303288).

Almost surely, 2^651610061501 is an apocalyptic number.

It is an amenable number.

651610061501 is a deficient number, since it is larger than the sum of its proper divisors (93087151651).

651610061501 is an equidigital number, since it uses as much as digits as its factorization.

651610061501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93087151650.

The product of its (nonzero) digits is 5400, while the sum is 32.

Adding to 651610061501 its reverse (105160016156), we get a palindrome (756770077657).

The spelling of 651610061501 in words is "six hundred fifty-one billion, six hundred ten million, sixty-one thousand, five hundred one".