136820513451244 has 36 divisors (see below), whose sum is σ = 294911442866376. Its totient is φ = 55188106264704.

The previous prime is 136820513451241. The next prime is 136820513451277. The reversal of 136820513451244 is 442154315028631.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (136820513451241) 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, 20531286202 + ... + 20531292865.

It is an arithmetic number, because the mean of its divisors is an integer number (8191984524066).

Almost surely, 2^{136820513451244} is an apocalyptic number.

136820513451244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

136820513451244 is an abundant number, since it is smaller than the sum of its proper divisors (158090929415132).

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

136820513451244 is a wasteful number, since it uses less digits than its factorization.

136820513451244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41062579102 (or 41062579093 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 49.

Adding to 136820513451244 its reverse (442154315028631), we get a palindrome (578974828479875).

The spelling of 136820513451244 in words is "one hundred thirty-six trillion, eight hundred twenty billion, five hundred thirteen million, four hundred fifty-one thousand, two hundred forty-four".