1630842291971 has 4 divisors (see below), whose sum is σ = 1631160883200. Its totient is φ = 1630523700744.

The previous prime is 1630842291907. The next prime is 1630842292067. The reversal of 1630842291971 is 1791922480361.

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 1630842291971 - 2⁶ = 1630842291907 is a prime.

It is a super-2 number, since 2×1630842291971² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630842296971) 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, 159287936 + ... + 159298173.

It is an arithmetic number, because the mean of its divisors is an integer number (407790220800).

Almost surely, 2^{1630842291971} is an apocalyptic number.

1630842291971 is a deficient number, since it is larger than the sum of its proper divisors (318591229).

1630842291971 is an equidigital number, since it uses as much as digits as its factorization.

1630842291971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318591228.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 1630842291971 in words is "one trillion, six hundred thirty billion, eight hundred forty-two million, two hundred ninety-one thousand, nine hundred seventy-one".