137721520433 has 16 divisors (see below), whose sum is σ = 159043745280. Its totient is φ = 116811611136.

The previous prime is 137721520429. The next prime is 137721520477. The reversal of 137721520433 is 334025127731.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 137721520433 - 2² = 137721520429 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137721520403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5904488 + ... + 5927766.

It is an arithmetic number, because the mean of its divisors is an integer number (9940234080).

Almost surely, 2^137721520433 is an apocalyptic number.

It is an amenable number.

137721520433 is a deficient number, since it is larger than the sum of its proper divisors (21322224847).

137721520433 is an equidigital number, since it uses as much as digits as its factorization.

137721520433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32096.

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 137721520433 in words is "one hundred thirty-seven billion, seven hundred twenty-one million, five hundred twenty thousand, four hundred thirty-three".