1970558476991 has 4 divisors (see below), whose sum is σ = 2122139898312. Its totient is φ = 1818977055672.

The previous prime is 1970558476981. The next prime is 1970558477033. The reversal of 1970558476991 is 1996748550791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1970558476991 - 2²² = 1970554282687 is a prime.

It is a super-2 number, since 2×1970558476991² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970558476981) 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, 75790710641 + ... + 75790710666.

It is an arithmetic number, because the mean of its divisors is an integer number (530534974578).

Almost surely, 2^{1970558476991} is an apocalyptic number.

1970558476991 is a deficient number, since it is larger than the sum of its proper divisors (151581421321).

1970558476991 is a wasteful number, since it uses less digits than its factorization.

1970558476991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151581421320.

The product of its (nonzero) digits is 171460800, while the sum is 71.

The spelling of 1970558476991 in words is "one trillion, nine hundred seventy billion, five hundred fifty-eight million, four hundred seventy-six thousand, nine hundred ninety-one".