740686321625 has 32 divisors (see below), whose sum is σ = 978930699552. Its totient is φ = 557591193600.

The previous prime is 740686321561. The next prime is 740686321651. The reversal of 740686321625 is 526123686047.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 661572383641 + 79113937984 = 813371^2 + 281272^2 .

It is not a de Polignac number, because 740686321625 - 2⁶ = 740686321561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12799757 + ... + 12857493.

It is an arithmetic number, because the mean of its divisors is an integer number (30591584361).

Almost surely, 2^740686321625 is an apocalyptic number.

It is an amenable number.

740686321625 is a deficient number, since it is larger than the sum of its proper divisors (238244377927).

740686321625 is a wasteful number, since it uses less digits than its factorization.

740686321625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63806 (or 63796 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 740686321625 in words is "seven hundred forty billion, six hundred eighty-six million, three hundred twenty-one thousand, six hundred twenty-five".