1597916729650 has 12 divisors (see below), whose sum is σ = 2972125117242. Its totient is φ = 639166691840.

The previous prime is 1597916729639. The next prime is 1597916729681. The reversal of 1597916729650 is 569276197951.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1378245476169 + 219671253481 = 1173987^2 + 468691^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15979167247 + ... + 15979167346.

Almost surely, 2^{1597916729650} is an apocalyptic number.

1597916729650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1597916729650 is a deficient number, since it is larger than the sum of its proper divisors (1374208387592).

1597916729650 is a wasteful number, since it uses less digits than its factorization.

1597916729650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31958334605 (or 31958334600 counting only the distinct ones).

The product of its (nonzero) digits is 64297800, while the sum is 67.

The spelling of 1597916729650 in words is "one trillion, five hundred ninety-seven billion, nine hundred sixteen million, seven hundred twenty-nine thousand, six hundred fifty".