725319981508 has 12 divisors (see below), whose sum is σ = 1269323031340. Its totient is φ = 362656258272.

The previous prime is 725319981497. The next prime is 725319981523. The reversal of 725319981508 is 805189913527.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 309839183424 + 415480798084 = 556632^2 + 644578^2 .

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, 470391 + ... + 1293022.

Almost surely, 2^725319981508 is an apocalyptic number.

It is an amenable number.

725319981508 is a deficient number, since it is larger than the sum of its proper divisors (544003049832).

725319981508 is a wasteful number, since it uses less digits than its factorization.

725319981508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866246 (or 1866244 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 58.

The spelling of 725319981508 in words is "seven hundred twenty-five billion, three hundred nineteen million, nine hundred eighty-one thousand, five hundred eight".