1156663857447 has 24 divisors (see below), whose sum is σ = 1971007334400. Its totient is φ = 639629781840.

The previous prime is 1156663857443. The next prime is 1156663857449. The reversal of 1156663857447 is 7447583666511.

It is not a de Polignac number, because 1156663857447 - 2² = 1156663857443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156663857443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296122947 + ... + 296126852.

It is an arithmetic number, because the mean of its divisors is an integer number (82125305600).

Almost surely, 2^{1156663857447} is an apocalyptic number.

1156663857447 is a deficient number, since it is larger than the sum of its proper divisors (814343476953).

1156663857447 is a wasteful number, since it uses less digits than its factorization.

1156663857447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592249843 (or 592249840 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 63.

The spelling of 1156663857447 in words is "one trillion, one hundred fifty-six billion, six hundred sixty-three million, eight hundred fifty-seven thousand, four hundred forty-seven".