1577011540657 has 24 divisors (see below), whose sum is σ = 2014992590400. Its totient is φ = 1224903357216.

The previous prime is 1577011540649. The next prime is 1577011540673. The reversal of 1577011540657 is 7560451107751.

It is not a de Polignac number, because 1577011540657 - 2³ = 1577011540649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 1577011540657.

It is not an unprimeable number, because it can be changed into a prime (1577011540607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36802282 + ... + 36845107.

It is an arithmetic number, because the mean of its divisors is an integer number (83958024600).

Almost surely, 2^{1577011540657} is an apocalyptic number.

It is an amenable number.

1577011540657 is a deficient number, since it is larger than the sum of its proper divisors (437981049743).

1577011540657 is a wasteful number, since it uses less digits than its factorization.

1577011540657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73647445 (or 73647438 counting only the distinct ones).

The product of its (nonzero) digits is 1029000, while the sum is 49.

The spelling of 1577011540657 in words is "one trillion, five hundred seventy-seven billion, eleven million, five hundred forty thousand, six hundred fifty-seven".