1971077857090 has 16 divisors (see below), whose sum is σ = 3547972562688. Its totient is φ = 788423938416.

The previous prime is 1971077857061. The next prime is 1971077857103. The reversal of 1971077857090 is 907587701791.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 328399 + ... + 2012461.

It is an arithmetic number, because the mean of its divisors is an integer number (221748285168).

Almost surely, 2^{1971077857090} is an apocalyptic number.

1971077857090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1971077857090 is a deficient number, since it is larger than the sum of its proper divisors (1576894705598).

1971077857090 is a wasteful number, since it uses less digits than its factorization.

1971077857090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801113.

The product of its (nonzero) digits is 7779240, while the sum is 61.

The spelling of 1971077857090 in words is "one trillion, nine hundred seventy-one billion, seventy-seven million, eight hundred fifty-seven thousand, ninety".