74873924161 has 9 divisors (see below), whose sum is σ = 78277430371. Its totient is φ = 71612516272.

The previous prime is 74873924101. The next prime is 74873924171. The reversal of 74873924161 is 16142937847.

It is a happy number.

The square root of 74873924161 is 273631.

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., 74471681025 + 402243136 = 272895^2 + 20056^2 .

It is not a de Polignac number, because 74873924161 - 2⁷ = 74873924033 is a prime.

It is a super-2 number, since 2×74873924161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74873924099 and 74873924108.

It is not an unprimeable number, because it can be changed into a prime (74873924101) 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, 6287565 + ... + 6299461.

Almost surely, 2^74873924161 is an apocalyptic number.

74873924161 is the 273631-st square number.

74873924161 is the 136816-th centered octagonal number.

It is an amenable number.

74873924161 is a deficient number, since it is larger than the sum of its proper divisors (3403506210).

74873924161 is an frugal number, since it uses more digits than its factorization.

74873924161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23840 (or 11920 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The spelling of 74873924161 in words is "seventy-four billion, eight hundred seventy-three million, nine hundred twenty-four thousand, one hundred sixty-one".