1975001531156 has 6 divisors (see below), whose sum is σ = 3456252679530. Its totient is φ = 987500765576.

The previous prime is 1975001531143. The next prime is 1975001531219. The reversal of 1975001531156 is 6511351005791.

It can be written as a sum of positive squares in only one way, i.e., 1855343652100 + 119657879056 = 1362110^2 + 345916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246875191391 + ... + 246875191398.

It is an arithmetic number, because the mean of its divisors is an integer number (576042113255).

Almost surely, 2^{1975001531156} is an apocalyptic number.

It is an amenable number.

1975001531156 is a deficient number, since it is larger than the sum of its proper divisors (1481251148374).

1975001531156 is a wasteful number, since it uses less digits than its factorization.

1975001531156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493750382793 (or 493750382791 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 44.

The spelling of 1975001531156 in words is "one trillion, nine hundred seventy-five billion, one million, five hundred thirty-one thousand, one hundred fifty-six".