651425445205 has 8 divisors (see below), whose sum is σ = 782776992312. Its totient is φ = 520429384128.

The previous prime is 651425445197. The next prime is 651425445221. The reversal of 651425445205 is 502544524156.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 148901830884 + 502523614321 = 385878^2 + 708889^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 651425445205 - 2³ = 651425445197 is a prime.

It is a super-2 number, since 2×651425445205² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88867474 + ... + 88874803.

It is an arithmetic number, because the mean of its divisors is an integer number (97847124039).

Almost surely, 2^651425445205 is an apocalyptic number.

It is an amenable number.

651425445205 is a deficient number, since it is larger than the sum of its proper divisors (131351547107).

651425445205 is a wasteful number, since it uses less digits than its factorization.

651425445205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177743015.

The product of its (nonzero) digits is 960000, while the sum is 43.

The spelling of 651425445205 in words is "six hundred fifty-one billion, four hundred twenty-five million, four hundred forty-five thousand, two hundred five".