7985611542 has 16 divisors (see below), whose sum is σ = 16196170752. Its totient is φ = 2624379240.

The previous prime is 7985611541. The next prime is 7985611553. The reversal of 7985611542 is 2451165897.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7985611491 and 7985611500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7985611541) 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, 9372358 + ... + 9373209.

It is an arithmetic number, because the mean of its divisors is an integer number (1012260672).

Almost surely, 2^7985611542 is an apocalyptic number.

7985611542 is an abundant number, since it is smaller than the sum of its proper divisors (8210559210).

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

7985611542 is a wasteful number, since it uses less digits than its factorization.

7985611542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18745643.

The product of its digits is 604800, while the sum is 48.

The square root of 7985611542 is about 89362.2489757280. The cubic root of 7985611542 is about 1998.8002422679.

The spelling of 7985611542 in words is "seven billion, nine hundred eighty-five million, six hundred eleven thousand, five hundred forty-two".