60721536251 has 16 divisors (see below), whose sum is σ = 64599897600. Its totient is φ = 56912846688.

The previous prime is 60721536217. The next prime is 60721536257. The reversal of 60721536251 is 15263512706.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 60721536251 - 2²² = 60717341947 is a prime.

It is a super-3 number, since 3×60721536251³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60721536257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1552190 + ... + 1590828.

It is an arithmetic number, because the mean of its divisors is an integer number (4037493600).

Almost surely, 2^60721536251 is an apocalyptic number.

60721536251 is a deficient number, since it is larger than the sum of its proper divisors (3878361349).

60721536251 is a wasteful number, since it uses less digits than its factorization.

60721536251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39538.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 60721536251 in words is "sixty billion, seven hundred twenty-one million, five hundred thirty-six thousand, two hundred fifty-one".