1549396541057 has 16 divisors (see below), whose sum is σ = 1667897352000. Its totient is φ = 1436413280064.

The previous prime is 1549396541041. The next prime is 1549396541081. The reversal of 1549396541057 is 7501456939451.

It is a happy number.

It is not a de Polignac number, because 1549396541057 - 2⁴ = 1549396541041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1549396540987 and 1549396541005.

It is not an unprimeable number, because it can be changed into a prime (1549396541027) 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, 10456082 + ... + 10603227.

It is an arithmetic number, because the mean of its divisors is an integer number (104243584500).

Almost surely, 2^{1549396541057} is an apocalyptic number.

It is an amenable number.

1549396541057 is a deficient number, since it is larger than the sum of its proper divisors (118500810943).

1549396541057 is a wasteful number, since it uses less digits than its factorization.

1549396541057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21059440.

The product of its (nonzero) digits is 20412000, while the sum is 59.

The spelling of 1549396541057 in words is "one trillion, five hundred forty-nine billion, three hundred ninety-six million, five hundred forty-one thousand, fifty-seven".