10915378568648 has 16 divisors (see below), whose sum is σ = 20466371984460. Its totient is φ = 5457679372800.

The previous prime is 10915378568609. The next prime is 10915378568687. The reversal of 10915378568648 is 84686587351901.

It is a Cunningham number, because it is equal to 3303843²-1.

It is an interprime number because it is at equal distance from previous prime (10915378568609) and next prime (10915378568687).

It can be written as a sum of positive squares in 2 ways, for example, as 10030383058084 + 884995510564 = 3167078^2 + 940742^2 .

It is a super-2 number, since 2×10915378568648² (a number of 27 digits) contains 22 as substring.

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, 5781728 + ... + 7433648.

Almost surely, 2^{10915378568648} is an apocalyptic number.

It is an amenable number.

10915378568648 is a deficient number, since it is larger than the sum of its proper divisors (9550993415812).

10915378568648 is a wasteful number, since it uses less digits than its factorization.

10915378568648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477888 (or 2477884 counting only the distinct ones).

The product of its (nonzero) digits is 348364800, while the sum is 71.

The spelling of 10915378568648 in words is "ten trillion, nine hundred fifteen billion, three hundred seventy-eight million, five hundred sixty-eight thousand, six hundred forty-eight".