60138777421 has 4 divisors (see below), whose sum is σ = 60175878844. Its totient is φ = 60101676000.

The previous prime is 60138777403. The next prime is 60138777469. The reversal of 60138777421 is 12477783106.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36969675625 + 23169101796 = 192275^2 + 152214^2 .

It is a cyclic number.

It is not a de Polignac number, because 60138777421 - 2²⁹ = 59601906509 is a prime.

It is a super-2 number, since 2×60138777421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60138778421) 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, 18548280 + ... + 18551521.

It is an arithmetic number, because the mean of its divisors is an integer number (15043969711).

Almost surely, 2^60138777421 is an apocalyptic number.

It is an amenable number.

60138777421 is a deficient number, since it is larger than the sum of its proper divisors (37101423).

60138777421 is a wasteful number, since it uses less digits than its factorization.

60138777421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37101422.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 60138777421 in words is "sixty billion, one hundred thirty-eight million, seven hundred seventy-seven thousand, four hundred twenty-one".