1375654848561 has 24 divisors (see below), whose sum is σ = 2284520644224. Its totient is φ = 781381362240.

The previous prime is 1375654848553. The next prime is 1375654848583. The reversal of 1375654848561 is 1658484565731.

It is a happy number.

1375654848561 is a `hidden beast` number, since 1 + 3 + 7 + 5 + 6 + 548 + 4 + 85 + 6 + 1 = 666.

It is not a de Polignac number, because 1375654848561 - 2³ = 1375654848553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1375654848461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65366100 + ... + 65387141.

It is an arithmetic number, because the mean of its divisors is an integer number (95188360176).

Almost surely, 2^{1375654848561} is an apocalyptic number.

It is an amenable number.

1375654848561 is a deficient number, since it is larger than the sum of its proper divisors (908865795663).

1375654848561 is a wasteful number, since it uses less digits than its factorization.

1375654848561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130753421 (or 130753418 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 63.

The spelling of 1375654848561 in words is "one trillion, three hundred seventy-five billion, six hundred fifty-four million, eight hundred forty-eight thousand, five hundred sixty-one".