247842116020556 has 24 divisors (see below), whose sum is σ = 434588852355840. Its totient is φ = 123673875752592.

The previous prime is 247842116020489. The next prime is 247842116020573. The reversal of 247842116020556 is 655020611248742.

It is a super-2 number, since 2×247842116020556² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247842116020498 and 247842116020507.

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, 402911555 + ... + 403526213.

It is an arithmetic number, because the mean of its divisors is an integer number (18107868848160).

Almost surely, 2^{247842116020556} is an apocalyptic number.

It is an amenable number.

247842116020556 is a deficient number, since it is larger than the sum of its proper divisors (186746736335284).

247842116020556 is a wasteful number, since it uses less digits than its factorization.

247842116020556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815573 (or 815571 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 53.

The spelling of 247842116020556 in words is "two hundred forty-seven trillion, eight hundred forty-two billion, one hundred sixteen million, twenty thousand, five hundred fifty-six".