1147821397655 has 32 divisors (see below), whose sum is σ = 1458443232000. Its totient is φ = 865794506752.

The previous prime is 1147821397621. The next prime is 1147821397661. The reversal of 1147821397655 is 5567931287411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1147821397655 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1147821397594 and 1147821397603.

It is a congruent number.

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, 2872379 + ... + 3247491.

It is an arithmetic number, because the mean of its divisors is an integer number (45576351000).

Almost surely, 2^{1147821397655} is an apocalyptic number.

1147821397655 is a deficient number, since it is larger than the sum of its proper divisors (310621834345).

1147821397655 is a wasteful number, since it uses less digits than its factorization.

1147821397655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375643.

The product of its digits is 12700800, while the sum is 59.

The spelling of 1147821397655 in words is "one trillion, one hundred forty-seven billion, eight hundred twenty-one million, three hundred ninety-seven thousand, six hundred fifty-five".