1228157872837 has 8 divisors (see below), whose sum is σ = 1433473019136. Its totient is φ = 1030308731952.

The previous prime is 1228157872819. The next prime is 1228157872841. The reversal of 1228157872837 is 7382787518221.

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

It is a cyclic number.

It is not a de Polignac number, because 1228157872837 - 2⁷ = 1228157872709 is a prime.

It is a super-2 number, since 2×1228157872837² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228157872867) 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, 1866500998 + ... + 1866501655.

It is an arithmetic number, because the mean of its divisors is an integer number (179184127392).

Almost surely, 2^{1228157872837} is an apocalyptic number.

It is an amenable number.

1228157872837 is a deficient number, since it is larger than the sum of its proper divisors (205315146299).

1228157872837 is an equidigital number, since it uses as much as digits as its factorization.

1228157872837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733002707.

The product of its digits is 21073920, while the sum is 61.

The spelling of 1228157872837 in words is "one trillion, two hundred twenty-eight billion, one hundred fifty-seven million, eight hundred seventy-two thousand, eight hundred thirty-seven".