1077971421855 has 8 divisors (see below), whose sum is σ = 1724754274992. Its totient is φ = 574918091648.

The previous prime is 1077971421853. The next prime is 1077971421881. The reversal of 1077971421855 is 5581241797701.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1077971421855 - 2¹ = 1077971421853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1077971421795 and 1077971421804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1077971421851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35932380714 + ... + 35932380743.

It is an arithmetic number, because the mean of its divisors is an integer number (215594284374).

Almost surely, 2^{1077971421855} is an apocalyptic number.

1077971421855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1077971421855 is a deficient number, since it is larger than the sum of its proper divisors (646782853137).

1077971421855 is an equidigital number, since it uses as much as digits as its factorization.

1077971421855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71864761465.

The product of its (nonzero) digits is 4939200, while the sum is 57.

The spelling of 1077971421855 in words is "one trillion, seventy-seven billion, nine hundred seventy-one million, four hundred twenty-one thousand, eight hundred fifty-five".