1131313031978 has 16 divisors (see below), whose sum is σ = 1738098368160. Its totient is φ = 552101820336.

The previous prime is 1131313031977. The next prime is 1131313031993. The reversal of 1131313031978 is 8791303131311.

It is a super-3 number, since 3×1131313031978³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131313031977) 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, 38713076 + ... + 38742287.

It is an arithmetic number, because the mean of its divisors is an integer number (108631148010).

Almost surely, 2^{1131313031978} is an apocalyptic number.

1131313031978 is a deficient number, since it is larger than the sum of its proper divisors (606785336182).

1131313031978 is a wasteful number, since it uses less digits than its factorization.

1131313031978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77455541.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 1131313031978 in words is "one trillion, one hundred thirty-one billion, three hundred thirteen million, thirty-one thousand, nine hundred seventy-eight".