60721712137 has 4 divisors (see below), whose sum is σ = 61628006416. Its totient is φ = 59815417860.

The previous prime is 60721712131. The next prime is 60721712173. The reversal of 60721712137 is 73121712706.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 60721712137 - 2³⁵ = 26361973769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 60721712096 and 60721712105.

It is not an unprimeable number, because it can be changed into a prime (60721712131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453147039 + ... + 453147172.

It is an arithmetic number, because the mean of its divisors is an integer number (15407001604).

Almost surely, 2^60721712137 is an apocalyptic number.

60721712137 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

60721712137 is a deficient number, since it is larger than the sum of its proper divisors (906294279).

60721712137 is an equidigital number, since it uses as much as digits as its factorization.

60721712137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906294278.

The product of its (nonzero) digits is 24696, while the sum is 37.

The spelling of 60721712137 in words is "sixty billion, seven hundred twenty-one million, seven hundred twelve thousand, one hundred thirty-seven".