65773121442 has 32 divisors (see below), whose sum is σ = 150681062400. Its totient is φ = 18749508048.

The previous prime is 65773121437. The next prime is 65773121443. The reversal of 65773121442 is 24412137756.

It is a super-2 number, since 2×65773121442² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 65773121394 and 65773121403.

It is not an unprimeable number, because it can be changed into a prime (65773121443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1765192 + ... + 1802067.

It is an arithmetic number, because the mean of its divisors is an integer number (4708783200).

Almost surely, 2^65773121442 is an apocalyptic number.

65773121442 is an abundant number, since it is smaller than the sum of its proper divisors (84907940958).

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

65773121442 is a wasteful number, since it uses less digits than its factorization.

65773121442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567710.

The product of its digits is 282240, while the sum is 42.

The spelling of 65773121442 in words is "sixty-five billion, seven hundred seventy-three million, one hundred twenty-one thousand, four hundred forty-two".