1155151998681 has 16 divisors (see below), whose sum is σ = 1542172614528. Its totient is φ = 769116988800.

The previous prime is 1155151998661. The next prime is 1155151998697. The reversal of 1155151998681 is 1868991515511.

It is not a de Polignac number, because 1155151998681 - 2⁶ = 1155151998617 is a prime.

It is a super-2 number, since 2×1155151998681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155151998661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7393551 + ... + 7548171.

It is an arithmetic number, because the mean of its divisors is an integer number (96385788408).

Almost surely, 2^{1155151998681} is an apocalyptic number.

It is an amenable number.

1155151998681 is a deficient number, since it is larger than the sum of its proper divisors (387020615847).

1155151998681 is a wasteful number, since it uses less digits than its factorization.

1155151998681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157792.

The product of its digits is 3888000, while the sum is 60.

The spelling of 1155151998681 in words is "one trillion, one hundred fifty-five billion, one hundred fifty-one million, nine hundred ninety-eight thousand, six hundred eighty-one".