1031648720557 has 16 divisors (see below), whose sum is σ = 1270591934080. Its totient is φ = 815689973952.

The previous prime is 1031648720533. The next prime is 1031648720567. The reversal of 1031648720557 is 7550278461301.

1031648720557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1031648720557 - 2¹⁵ = 1031648687789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1031648720557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031648720567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3752358 + ... + 4017895.

It is an arithmetic number, because the mean of its divisors is an integer number (79411995880).

Almost surely, 2^{1031648720557} is an apocalyptic number.

It is an amenable number.

1031648720557 is a deficient number, since it is larger than the sum of its proper divisors (238943213523).

1031648720557 is a wasteful number, since it uses less digits than its factorization.

1031648720557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7771732.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 1031648720557 in words is "one trillion, thirty-one billion, six hundred forty-eight million, seven hundred twenty thousand, five hundred fifty-seven".