42743691225 has 24 divisors (see below), whose sum is σ = 78521745120. Its totient is φ = 22796634960.

The previous prime is 42743691217. The next prime is 42743691227. The reversal of 42743691225 is 52219634724.

42743691225 is a `hidden beast` number, since 4 + 274 + 369 + 12 + 2 + 5 = 666.

It is not a de Polignac number, because 42743691225 - 2³ = 42743691217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (42743691227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31661319 + ... + 31662668.

It is an arithmetic number, because the mean of its divisors is an integer number (3271739380).

Almost surely, 2^42743691225 is an apocalyptic number.

42743691225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42743691225 is a deficient number, since it is larger than the sum of its proper divisors (35778053895).

42743691225 is a wasteful number, since it uses less digits than its factorization.

42743691225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63324006 (or 63323995 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 42743691225 in words is "forty-two billion, seven hundred forty-three million, six hundred ninety-one thousand, two hundred twenty-five".