1971527660 has 12 divisors (see below), whose sum is σ = 4140208128. Its totient is φ = 788611056.

The previous prime is 1971527653. The next prime is 1971527669. The reversal of 1971527660 is 667251791.

It is not an unprimeable number, because it can be changed into a prime (1971527669) 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, 49288172 + ... + 49288211.

It is an arithmetic number, because the mean of its divisors is an integer number (345017344).

Almost surely, 2^1971527660 is an apocalyptic number.

1971527660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1971527660 is an abundant number, since it is smaller than the sum of its proper divisors (2168680468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1971527660 is a wasteful number, since it uses less digits than its factorization.

1971527660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98576392 (or 98576390 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 1971527660 is about 44401.8880229208. Note that the first 3 decimals coincide. The cubic root of 1971527660 is about 1253.9136347823.

The spelling of 1971527660 in words is "one billion, nine hundred seventy-one million, five hundred twenty-seven thousand, six hundred sixty".