1015747512649 has 9 divisors (see below), whose sum is σ = 1043980437927. Its totient is φ = 988258594824.

The previous prime is 1015747512643. The next prime is 1015747512721. The reversal of 1015747512649 is 9462157475101.

The square root of 1015747512649 is 1007843.

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

1015747512649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 908904823225 + 106842689424 = 953365^2 + 326868^2 .

It is not a de Polignac number, because 1015747512649 - 2¹⁵ = 1015747479881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1015747512596 and 1015747512605.

It is not an unprimeable number, because it can be changed into a prime (1015747512643) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 37276572 + ... + 37303810.

Almost surely, 2^{1015747512649} is an apocalyptic number.

1015747512649 is the 1007843-rd square number.

1015747512649 is the 503922-nd centered octagonal number.

It is an amenable number.

1015747512649 is a deficient number, since it is larger than the sum of its proper divisors (28232925278).

1015747512649 is an frugal number, since it uses more digits than its factorization.

1015747512649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54552 (or 27276 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 1015747512649 in words is "one trillion, fifteen billion, seven hundred forty-seven million, five hundred twelve thousand, six hundred forty-nine".