247478890995 has 96 divisors (see below), whose sum is σ = 494538670080. Its totient is φ = 112143709440.

The previous prime is 247478890987. The next prime is 247478891057. The reversal of 247478890995 is 599098874742.

247478890995 is a `hidden beast` number, since 2 + 474 + 78 + 89 + 0 + 9 + 9 + 5 = 666.

It is not a de Polignac number, because 247478890995 - 2³ = 247478890987 is a prime.

It is a super-2 number, since 2×247478890995² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 64766185 + ... + 64770005.

It is an arithmetic number, because the mean of its divisors is an integer number (5151444480).

Almost surely, 2^247478890995 is an apocalyptic number.

247478890995 is a deficient number, since it is larger than the sum of its proper divisors (247059779085).

247478890995 is a wasteful number, since it uses less digits than its factorization.

247478890995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5585 (or 5582 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 72.

The spelling of 247478890995 in words is "two hundred forty-seven billion, four hundred seventy-eight million, eight hundred ninety thousand, nine hundred ninety-five".