1397724520516 has 9 divisors (see below), whose sum is σ = 2446022048799. Its totient is φ = 698861078004.

The previous prime is 1397724520513. The next prime is 1397724520519. The reversal of 1397724520516 is 6150254277931.

The square root of 1397724520516 is 1182254.

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

It is an interprime number because it is at equal distance from previous prime (1397724520513) and next prime (1397724520519).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397724520513) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2068945 + ... + 2660071.

Almost surely, 2^{1397724520516} is an apocalyptic number.

1397724520516 is the 1182254-th square number.

It is an amenable number.

1397724520516 is a deficient number, since it is larger than the sum of its proper divisors (1048297528283).

1397724520516 is an frugal number, since it uses more digits than its factorization.

1397724520516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182258 (or 591129 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 1397724520516 in words is "one trillion, three hundred ninety-seven billion, seven hundred twenty-four million, five hundred twenty thousand, five hundred sixteen".