1158121386537 has 32 divisors (see below), whose sum is σ = 1584826508160. Its totient is φ = 752017643520.

The previous prime is 1158121386533. The next prime is 1158121386547. The reversal of 1158121386537 is 7356831218511.

It is not a de Polignac number, because 1158121386537 - 2² = 1158121386533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1158121386537.

It is not an unprimeable number, because it can be changed into a prime (1158121386533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9750487 + ... + 9868547.

It is an arithmetic number, because the mean of its divisors is an integer number (49525828380).

Almost surely, 2^{1158121386537} is an apocalyptic number.

It is an amenable number.

1158121386537 is a deficient number, since it is larger than the sum of its proper divisors (426705121623).

1158121386537 is a wasteful number, since it uses less digits than its factorization.

1158121386537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118633.

The product of its digits is 1209600, while the sum is 51.

The spelling of 1158121386537 in words is "one trillion, one hundred fifty-eight billion, one hundred twenty-one million, three hundred eighty-six thousand, five hundred thirty-seven".