1040691278548 has 12 divisors (see below), whose sum is σ = 1821508878420. Its totient is φ = 520260170432.

The previous prime is 1040691278521. The next prime is 1040691278587. The reversal of 1040691278548 is 8458721960401.

It can be written as a sum of positive squares in 2 ways, for example, as 414823588624 + 625867689924 = 644068^2 + 791118^2 .

It is a congruent number.

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, 21339811 + ... + 21388522.

It is an arithmetic number, because the mean of its divisors is an integer number (151792406535).

Almost surely, 2^{1040691278548} is an apocalyptic number.

It is an amenable number.

1040691278548 is a deficient number, since it is larger than the sum of its proper divisors (780817599872).

1040691278548 is a wasteful number, since it uses less digits than its factorization.

1040691278548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42734426 (or 42734424 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 1040691278548 in words is "one trillion, forty billion, six hundred ninety-one million, two hundred seventy-eight thousand, five hundred forty-eight".