651651461 has 4 divisors (see below), whose sum is σ = 651702924. Its totient is φ = 651600000.

The previous prime is 651651457. The next prime is 651651467. The reversal of 651651461 is 164156156.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 641608900 + 10042561 = 25330^2 + 3169^2 .

It is a cyclic number.

It is not a de Polignac number, because 651651461 - 2² = 651651457 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 (651651467) 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, 8021 + ... + 36981.

It is an arithmetic number, because the mean of its divisors is an integer number (162925731).

Almost surely, 2^651651461 is an apocalyptic number.

It is an amenable number.

651651461 is a deficient number, since it is larger than the sum of its proper divisors (51463).

651651461 is a wasteful number, since it uses less digits than its factorization.

651651461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51462.

The product of its digits is 21600, while the sum is 35.

The square root of 651651461 is about 25527.4648369163. The cubic root of 651651461 is about 866.9721054745.

The spelling of 651651461 in words is "six hundred fifty-one million, six hundred fifty-one thousand, four hundred sixty-one".