651939422971 has 8 divisors (see below), whose sum is σ = 695652738320. Its totient is φ = 609166179072.

The previous prime is 651939422879. The next prime is 651939422987. The reversal of 651939422971 is 179224939156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651939422971 is a prime.

It is a super-2 number, since 2×651939422971² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651939462971) by changing a digit.

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, 235016430 + ... + 235019203.

It is an arithmetic number, because the mean of its divisors is an integer number (86956592290).

Almost surely, 2^651939422971 is an apocalyptic number.

651939422971 is a deficient number, since it is larger than the sum of its proper divisors (43713315349).

651939422971 is a wasteful number, since it uses less digits than its factorization.

651939422971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470035725.

The product of its digits is 7348320, while the sum is 58.

The spelling of 651939422971 in words is "six hundred fifty-one billion, nine hundred thirty-nine million, four hundred twenty-two thousand, nine hundred seventy-one".