1977056801 has 4 divisors (see below), whose sum is σ = 1978628400. Its totient is φ = 1975485204.

The previous prime is 1977056797. The next prime is 1977056821. The reversal of 1977056801 is 1086507791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1977056801 - 2² = 1977056797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1977056821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783911 + ... + 786428.

It is an arithmetic number, because the mean of its divisors is an integer number (494657100).

Almost surely, 2^1977056801 is an apocalyptic number.

It is an amenable number.

1977056801 is a deficient number, since it is larger than the sum of its proper divisors (1571599).

1977056801 is a wasteful number, since it uses less digits than its factorization.

1977056801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571598.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 1977056801 is about 44464.1068840925. The cubic root of 1977056801 is about 1255.0847391764.

The spelling of 1977056801 in words is "one billion, nine hundred seventy-seven million, fifty-six thousand, eight hundred one".