140721734518 has 4 divisors (see below), whose sum is σ = 211082601780. Its totient is φ = 70360867258.

The previous prime is 140721734471. The next prime is 140721734537. The reversal of 140721734518 is 815437127041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 815437127041 = 1097 ⋅743333753.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35180433628 + ... + 35180433631.

It is an arithmetic number, because the mean of its divisors is an integer number (52770650445).

Almost surely, 2^140721734518 is an apocalyptic number.

140721734518 is a deficient number, since it is larger than the sum of its proper divisors (70360867262).

140721734518 is an equidigital number, since it uses as much as digits as its factorization.

140721734518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70360867261.

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 140721734518 in words is "one hundred forty billion, seven hundred twenty-one million, seven hundred thirty-four thousand, five hundred eighteen".