1947077458144 has 72 divisors (see below), whose sum is σ = 4802167050408. Its totient is φ = 770272392960.

The previous prime is 1947077458133. The next prime is 1947077458147. The reversal of 1947077458144 is 4418547707491.

It is a happy number.

It is a super-2 number, since 2×1947077458144² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947077458147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47739562 + ... + 47780329.

It is an arithmetic number, because the mean of its divisors is an integer number (66696764589).

Almost surely, 2^{1947077458144} is an apocalyptic number.

1947077458144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1947077458144 is an abundant number, since it is smaller than the sum of its proper divisors (2855089592264).

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

1947077458144 is a wasteful number, since it uses less digits than its factorization.

1947077458144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95519928 (or 95519913 counting only the distinct ones).

The product of its (nonzero) digits is 31610880, while the sum is 61.

The spelling of 1947077458144 in words is "one trillion, nine hundred forty-seven billion, seventy-seven million, four hundred fifty-eight thousand, one hundred forty-four".