1197155974523 has 4 divisors (see below), whose sum is σ = 1229511541440. Its totient is φ = 1164800407608.

The previous prime is 1197155974499. The next prime is 1197155974537. The reversal of 1197155974523 is 3254795517911.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1197155974523 - 2¹⁴ = 1197155958139 is a prime.

It is a super-2 number, since 2×1197155974523² (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 (1197155974583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16177783403 + ... + 16177783476.

It is an arithmetic number, because the mean of its divisors is an integer number (307377885360).

Almost surely, 2^{1197155974523} is an apocalyptic number.

1197155974523 is a deficient number, since it is larger than the sum of its proper divisors (32355566917).

1197155974523 is an equidigital number, since it uses as much as digits as its factorization.

1197155974523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32355566916.

The product of its digits is 11907000, while the sum is 59.

The spelling of 1197155974523 in words is "one trillion, one hundred ninety-seven billion, one hundred fifty-five million, nine hundred seventy-four thousand, five hundred twenty-three".