1947447046944 has 576 divisors, whose sum is σ = 6635513364480. Its totient is φ = 530197678080.

The previous prime is 1947447046873. The next prime is 1947447046967. The reversal of 1947447046944 is 4496407447491.

1947447046944 is a `hidden beast` number, since 1 + 9 + 4 + 74 + 470 + 4 + 6 + 94 + 4 = 666.

It is a super-2 number, since 2×1947447046944² (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 an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1756038262 + ... + 1756039370.

It is an arithmetic number, because the mean of its divisors is an integer number (11519988480).

Almost surely, 2^{1947447046944} is an apocalyptic number.

1947447046944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1947447046944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3317756682240).

1947447046944 is an abundant number, since it is smaller than the sum of its proper divisors (4688066317536).

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

1947447046944 is a wasteful number, since it uses less digits than its factorization.

1947447046944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 63.

The spelling of 1947447046944 in words is "one trillion, nine hundred forty-seven billion, four hundred forty-seven million, forty-six thousand, nine hundred forty-four".