642149884527 has 8 divisors (see below), whose sum is σ = 856204594560. Its totient is φ = 428097548760.

The previous prime is 642149884511. The next prime is 642149884567. The reversal of 642149884527 is 725488941246.

It is a happy number.

642149884527 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642149884527 - 2⁴ = 642149884511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642149884567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182452 + ... + 1147862.

It is an arithmetic number, because the mean of its divisors is an integer number (107025574320).

Almost surely, 2^642149884527 is an apocalyptic number.

642149884527 is a deficient number, since it is larger than the sum of its proper divisors (214054710033).

642149884527 is a wasteful number, since it uses less digits than its factorization.

642149884527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187133.

The product of its digits is 30965760, while the sum is 60.

The spelling of 642149884527 in words is "six hundred forty-two billion, one hundred forty-nine million, eight hundred eighty-four thousand, five hundred twenty-seven".