1151615611111 has 16 divisors (see below), whose sum is σ = 1358629908480. Its totient is φ = 955227723840.

The previous prime is 1151615611093. The next prime is 1151615611129. The reversal of 1151615611111 is 1111165161511.

It is an interprime number because it is at equal distance from previous prime (1151615611093) and next prime (1151615611129).

It is a cyclic number.

It is not a de Polignac number, because 1151615611111 - 2¹⁵ = 1151615578343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151615621111) 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, 9604950 + ... + 9724108.

It is an arithmetic number, because the mean of its divisors is an integer number (84914369280).

Almost surely, 2^{1151615611111} is an apocalyptic number.

1151615611111 is a deficient number, since it is larger than the sum of its proper divisors (207014297369).

1151615611111 is a wasteful number, since it uses less digits than its factorization.

1151615611111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163734.

The product of its digits is 900, while the sum is 31.

The spelling of 1151615611111 in words is "one trillion, one hundred fifty-one billion, six hundred fifteen million, six hundred eleven thousand, one hundred eleven".