65121421477152 has 48 divisors (see below), whose sum is σ = 176458045300992. Its totient is φ = 21006910152960.

The previous prime is 65121421477139. The next prime is 65121421477153. The reversal of 65121421477152 is 25177412412156.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×65121421477152² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (65121421477153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10941096063 + ... + 10941102014.

It is an arithmetic number, because the mean of its divisors is an integer number (3676209277104).

Almost surely, 2^{65121421477152} is an apocalyptic number.

65121421477152 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

65121421477152 is an abundant number, since it is smaller than the sum of its proper divisors (111336623823840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65121421477152 is a wasteful number, since it uses less digits than its factorization.

65121421477152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21882198121 (or 21882198113 counting only the distinct ones).

The product of its digits is 940800, while the sum is 48.

The spelling of 65121421477152 in words is "sixty-five trillion, one hundred twenty-one billion, four hundred twenty-one million, four hundred seventy-seven thousand, one hundred fifty-two".