1977577545 has 16 divisors (see below), whose sum is σ = 3176736192. Its totient is φ = 1050504000.

The previous prime is 1977577543. The next prime is 1977577549. The reversal of 1977577545 is 5457757791.

It is not a de Polignac number, because 1977577545 - 2¹ = 1977577543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1977577543) 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, 258862 + ... + 266391.

It is an arithmetic number, because the mean of its divisors is an integer number (198546012).

Almost surely, 2^1977577545 is an apocalyptic number.

1977577545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1977577545 is a deficient number, since it is larger than the sum of its proper divisors (1199158647).

1977577545 is a wasteful number, since it uses less digits than its factorization.

1977577545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525512.

The product of its digits is 10804500, while the sum is 57.

The square root of 1977577545 is about 44469.9622779242. The cubic root of 1977577545 is about 1255.1949232427.

The spelling of 1977577545 in words is "one billion, nine hundred seventy-seven million, five hundred seventy-seven thousand, five hundred forty-five".