1218697848925 has 12 divisors (see below), whose sum is σ = 1513316786740. Its totient is φ = 973583147520.

The previous prime is 1218697848923. The next prime is 1218697848941. The reversal of 1218697848925 is 5298487968121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 158084169604 + 1060613679321 = 397598^2 + 1029861^2 .

It is not a de Polignac number, because 1218697848925 - 2¹ = 1218697848923 is a prime.

It is a hoax number, since the sum of its digits (70) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218697848923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34360212 + ... + 34395661.

Almost surely, 2^{1218697848925} is an apocalyptic number.

It is an amenable number.

1218697848925 is a deficient number, since it is larger than the sum of its proper divisors (294618937815).

1218697848925 is an equidigital number, since it uses as much as digits as its factorization.

1218697848925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68756592 (or 68756587 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 70.

The spelling of 1218697848925 in words is "one trillion, two hundred eighteen billion, six hundred ninety-seven million, eight hundred forty-eight thousand, nine hundred twenty-five".