5197836661542 has 40 divisors (see below), whose sum is σ = 13310862141456. Its totient is φ = 1485096188688.

The previous prime is 5197836661531. The next prime is 5197836661561. The reversal of 5197836661542 is 2451666387915.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 5197836661542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2291813973 + ... + 2291816240.

Almost surely, 2^{5197836661542} is an apocalyptic number.

5197836661542 is an abundant number, since it is smaller than the sum of its proper divisors (8113025479914).

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

5197836661542 is a wasteful number, since it uses less digits than its factorization.

5197836661542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583630234 (or 4583630225 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 63.

The spelling of 5197836661542 in words is "five trillion, one hundred ninety-seven billion, eight hundred thirty-six million, six hundred sixty-one thousand, five hundred forty-two".