1139947031651 has 2 divisors, whose sum is σ = 1139947031652. Its totient is φ = 1139947031650.

The previous prime is 1139947031647. The next prime is 1139947031669. The reversal of 1139947031651 is 1561307499311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1139947031651 - 2² = 1139947031647 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1139947031651.

It is not a weakly prime, because it can be changed into another prime (1139947031051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569973515825 + 569973515826.

It is an arithmetic number, because the mean of its divisors is an integer number (569973515826).

Almost surely, 2^{1139947031651} is an apocalyptic number.

1139947031651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139947031651 is an equidigital number, since it uses as much as digits as its factorization.

1139947031651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 1139947031651 in words is "one trillion, one hundred thirty-nine billion, nine hundred forty-seven million, thirty-one thousand, six hundred fifty-one".