651506632438 has 8 divisors (see below), whose sum is σ = 977273970120. Its totient is φ = 325748642400.

The previous prime is 651506632409. The next prime is 651506632481. The reversal of 651506632438 is 834236605156.

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

It is a super-2 number, since 2×651506632438² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 651506632391 and 651506632400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2159988 + ... + 2443063.

It is an arithmetic number, because the mean of its divisors is an integer number (122159246265).

Almost surely, 2^651506632438 is an apocalyptic number.

651506632438 is a deficient number, since it is larger than the sum of its proper divisors (325767337682).

651506632438 is a wasteful number, since it uses less digits than its factorization.

651506632438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4673822.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 651506632438 in words is "six hundred fifty-one billion, five hundred six million, six hundred thirty-two thousand, four hundred thirty-eight".