1156139996961 has 8 divisors (see below), whose sum is σ = 1553657949184. Its totient is φ = 764691021360.

The previous prime is 1156139996929. The next prime is 1156139997029. The reversal of 1156139996961 is 1696999316511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1156139996961 - 2⁵ = 1156139996929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1156139996892 and 1156139996901.

It is not an unprimeable number, because it can be changed into a prime (1156139996161) 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, 1517243710 + ... + 1517244471.

It is an arithmetic number, because the mean of its divisors is an integer number (194207243648).

Almost surely, 2^{1156139996961} is an apocalyptic number.

It is an amenable number.

1156139996961 is a deficient number, since it is larger than the sum of its proper divisors (397517952223).

1156139996961 is a wasteful number, since it uses less digits than its factorization.

1156139996961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034488311.

The product of its digits is 21257640, while the sum is 66.

The spelling of 1156139996961 in words is "one trillion, one hundred fifty-six billion, one hundred thirty-nine million, nine hundred ninety-six thousand, nine hundred sixty-one".