947861493642 has 32 divisors (see below), whose sum is σ = 2407267286400. Its totient is φ = 270817569504.

The previous prime is 947861493629. The next prime is 947861493673. The reversal of 947861493642 is 246394168749.

It is a happy number.

947861493642 is a `hidden beast` number, since 9 + 4 + 7 + 8 + 614 + 9 + 3 + 6 + 4 + 2 = 666.

It is a super-2 number, since 2×947861493642² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 947861493642.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253784667 + ... + 1253785422.

It is an arithmetic number, because the mean of its divisors is an integer number (75227102700).

Almost surely, 2^947861493642 is an apocalyptic number.

947861493642 is an abundant number, since it is smaller than the sum of its proper divisors (1459405792758).

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

947861493642 is a wasteful number, since it uses less digits than its factorization.

947861493642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507570107 (or 2507570101 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 947861493642 in words is "nine hundred forty-seven billion, eight hundred sixty-one million, four hundred ninety-three thousand, six hundred forty-two".