1071154621156 has 27 divisors (see below), whose sum is σ = 1937055626793. Its totient is φ = 518269574160.

The previous prime is 1071154621151. The next prime is 1071154621169. The reversal of 1071154621156 is 6511264511701.

The square root of 1071154621156 is 1034966.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 78708302500 + 992446318656 = 280550^2 + 996216^2 .

It is a super-2 number, since 2×1071154621156² (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 (1071154621151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 64159546 + ... + 64176238.

Almost surely, 2^{1071154621156} is an apocalyptic number.

1071154621156 is the 1034966-th square number.

It is an amenable number.

1071154621156 is a deficient number, since it is larger than the sum of its proper divisors (865901005637).

1071154621156 is an frugal number, since it uses more digits than its factorization.

1071154621156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33452 (or 16726 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 1071154621156 in words is "one trillion, seventy-one billion, one hundred fifty-four million, six hundred twenty-one thousand, one hundred fifty-six".