4532978126691 has 192 divisors, whose sum is σ = 8081824571392. Its totient is φ = 2393452800000.

The previous prime is 4532978126689. The next prime is 4532978126701. The reversal of 4532978126691 is 1966218792354.

4532978126691 is a `hidden beast` number, since 4 + 5 + 3 + 297 + 81 + 266 + 9 + 1 = 666.

It is not a de Polignac number, because 4532978126691 - 2¹ = 4532978126689 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (4532978126681) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2516921991 + ... + 2516923791.

Almost surely, 2^{4532978126691} is an apocalyptic number.

4532978126691 is a deficient number, since it is larger than the sum of its proper divisors (3548846444701).

4532978126691 is a wasteful number, since it uses less digits than its factorization.

4532978126691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514 (or 2511 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 4532978126691 in words is "four trillion, five hundred thirty-two billion, nine hundred seventy-eight million, one hundred twenty-six thousand, six hundred ninety-one".