1156137978009 has 16 divisors (see below), whose sum is σ = 1762504460288. Its totient is φ = 660361373712.

The previous prime is 1156137977993. The next prime is 1156137978013. The reversal of 1156137978009 is 9008797316511.

It is a happy number.

It is not a de Polignac number, because 1156137978009 - 2⁴ = 1156137977993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1156137978009.

It is not an unprimeable number, because it can be changed into a prime (1156137978049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11988307 + ... + 12084360.

It is an arithmetic number, because the mean of its divisors is an integer number (110156528768).

Almost surely, 2^{1156137978009} is an apocalyptic number.

It is an amenable number.

1156137978009 is a deficient number, since it is larger than the sum of its proper divisors (606366482279).

1156137978009 is a wasteful number, since it uses less digits than its factorization.

1156137978009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24074964.

The product of its (nonzero) digits is 2857680, while the sum is 57.

The spelling of 1156137978009 in words is "one trillion, one hundred fifty-six billion, one hundred thirty-seven million, nine hundred seventy-eight thousand, nine".