1216926502153 has 8 divisors (see below), whose sum is σ = 1227979332648. Its totient is φ = 1205878646784.

The previous prime is 1216926502109. The next prime is 1216926502177. The reversal of 1216926502153 is 3512056296121.

It can be written as a sum of positive squares in 4 ways, for example, as 51545799369 + 1165380702784 = 227037^2 + 1079528^2 .

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 1216926502153 - 2³³ = 1208336567561 is a prime.

It is a super-2 number, since 2×1216926502153² (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 (1216926505153) 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, 751476 + ... + 1731637.

It is an arithmetic number, because the mean of its divisors is an integer number (153497416581).

Almost surely, 2^{1216926502153} is an apocalyptic number.

It is an amenable number.

1216926502153 is a deficient number, since it is larger than the sum of its proper divisors (11052830495).

1216926502153 is a wasteful number, since it uses less digits than its factorization.

1216926502153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487563.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 1216926502153 in words is "one trillion, two hundred sixteen billion, nine hundred twenty-six million, five hundred two thousand, one hundred fifty-three".