651402339025 has 27 divisors (see below), whose sum is σ = 813884941233. Its totient is φ = 517186476000.

The previous prime is 651402339023. The next prime is 651402339031. The reversal of 651402339025 is 520933204156.

The square root of 651402339025 is 807095.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 19593560529 + 631808778496 = 139977^2 + 794864^2 .

It is not a de Polignac number, because 651402339025 - 2¹ = 651402339023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651402339023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 609356191 + ... + 609357259.

Almost surely, 2^651402339025 is an apocalyptic number.

651402339025 is the 807095-th square number.

651402339025 is the 403548-th centered octagonal number.

It is an amenable number.

651402339025 is a deficient number, since it is larger than the sum of its proper divisors (162482602208).

651402339025 is an frugal number, since it uses more digits than its factorization.

651402339025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 651402339025 in words is "six hundred fifty-one billion, four hundred two million, three hundred thirty-nine thousand, twenty-five".