1147821397656 has 32 divisors (see below), whose sum is σ = 2882194712640. Its totient is φ = 380921636768.

The previous prime is 1147821397621. The next prime is 1147821397661. The reversal of 1147821397656 is 6567931287411.

It is a self number, because there is not a number n which added to its sum of digits gives 1147821397656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105337926 + ... + 105348821.

It is an arithmetic number, because the mean of its divisors is an integer number (90068584770).

Almost surely, 2^{1147821397656} is an apocalyptic number.

It is an amenable number.

1147821397656 is an abundant number, since it is smaller than the sum of its proper divisors (1734373314984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1147821397656 is a wasteful number, since it uses less digits than its factorization.

1147821397656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210686983 (or 210686979 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 60.

The spelling of 1147821397656 in words is "one trillion, one hundred forty-seven billion, eight hundred twenty-one million, three hundred ninety-seven thousand, six hundred fifty-six".