67745157841 has 9 divisors (see below), whose sum is σ = 69368725659. Its totient is φ = 66158757336.

The previous prime is 67745157827. The next prime is 67745157911. The reversal of 67745157841 is 14875154776.

It is a happy number.

The square root of 67745157841 is 260279.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4942793025 + 62802364816 = 70305^2 + 250604^2 .

It is not a de Polignac number, because 67745157841 - 2¹⁵ = 67745125073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67745157341) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11188971 + ... + 11195023.

Almost surely, 2^67745157841 is an apocalyptic number.

67745157841 is the 260279-th square number.

67745157841 is the 130140-th centered octagonal number.

It is an amenable number.

67745157841 is a deficient number, since it is larger than the sum of its proper divisors (1623567818).

67745157841 is an frugal number, since it uses more digits than its factorization.

67745157841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12192 (or 6096 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 55.

It can be divided in two parts, 6774 and 5157841, that added together give a palindrome (5164615).

The spelling of 67745157841 in words is "sixty-seven billion, seven hundred forty-five million, one hundred fifty-seven thousand, eight hundred forty-one".