247491166078 has 16 divisors (see below), whose sum is σ = 402339883680. Its totient is φ = 113499131616.

The previous prime is 247491166057. The next prime is 247491166099. The reversal of 247491166078 is 870661194742.

It is an interprime number because it is at equal distance from previous prime (247491166057) and next prime (247491166099).

It is a super-2 number, since 2×247491166078² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30310858 + ... + 30319021.

It is an arithmetic number, because the mean of its divisors is an integer number (25146242730).

Almost surely, 2^247491166078 is an apocalyptic number.

247491166078 is a deficient number, since it is larger than the sum of its proper divisors (154848717602).

247491166078 is a wasteful number, since it uses less digits than its factorization.

247491166078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60630051.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 247491166078 in words is "two hundred forty-seven billion, four hundred ninety-one million, one hundred sixty-six thousand, seventy-eight".