1977655277077 has 4 divisors (see below), whose sum is σ = 1977664022496. Its totient is φ = 1977646531660.

The previous prime is 1977655277057. The next prime is 1977655277111. The reversal of 1977655277077 is 7707725567791.

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 a de Polignac number, because none of the positive numbers 2^k-1977655277077 is a prime.

It is a super-2 number, since 2×1977655277077² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1977655276997 and 1977655277015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977655277057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4024249 + ... + 4488862.

It is an arithmetic number, because the mean of its divisors is an integer number (494416005624).

Almost surely, 2^{1977655277077} is an apocalyptic number.

It is an amenable number.

1977655277077 is a deficient number, since it is larger than the sum of its proper divisors (8745419).

1977655277077 is an equidigital number, since it uses as much as digits as its factorization.

1977655277077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8745418.

The product of its (nonzero) digits is 317652300, while the sum is 70.

The spelling of 1977655277077 in words is "one trillion, nine hundred seventy-seven billion, six hundred fifty-five million, two hundred seventy-seven thousand, seventy-seven".