1971148729355 has 8 divisors (see below), whose sum is σ = 2547330665712. Its totient is φ = 1455617523168.

The previous prime is 1971148729351. The next prime is 1971148729367. The reversal of 1971148729355 is 5539278411791.

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 1971148729355 - 2² = 1971148729351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1971148729351) 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, 15162682469 + ... + 15162682598.

It is an arithmetic number, because the mean of its divisors is an integer number (318416333214).

Almost surely, 2^{1971148729355} is an apocalyptic number.

1971148729355 is a deficient number, since it is larger than the sum of its proper divisors (576181936357).

1971148729355 is a wasteful number, since it uses less digits than its factorization.

1971148729355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30325365085.

The product of its digits is 19051200, while the sum is 62.

The spelling of 1971148729355 in words is "one trillion, nine hundred seventy-one billion, one hundred forty-eight million, seven hundred twenty-nine thousand, three hundred fifty-five".