1188781156545 has 32 divisors (see below), whose sum is σ = 1909618416000. Its totient is φ = 631494994944.

The previous prime is 1188781156523. The next prime is 1188781156553. The reversal of 1188781156545 is 5456511878811.

It is not a de Polignac number, because 1188781156545 - 2¹³ = 1188781148353 is a prime.

It is a super-3 number, since 3×1188781156545³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16301334 + ... + 16374096.

It is an arithmetic number, because the mean of its divisors is an integer number (59675575500).

Almost surely, 2^{1188781156545} is an apocalyptic number.

1188781156545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1188781156545 is a deficient number, since it is larger than the sum of its proper divisors (720837259455).

1188781156545 is a wasteful number, since it uses less digits than its factorization.

1188781156545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77089.

The product of its digits is 10752000, while the sum is 60.

The spelling of 1188781156545 in words is "one trillion, one hundred eighty-eight billion, seven hundred eighty-one million, one hundred fifty-six thousand, five hundred forty-five".