74638534157 has 16 divisors (see below), whose sum is σ = 89435819520. Its totient is φ = 61487118000.

The previous prime is 74638534151. The next prime is 74638534213. The reversal of 74638534157 is 75143583647.

It is not a de Polignac number, because 74638534157 - 2⁶ = 74638534093 is a prime.

It is a super-2 number, since 2×74638534157² (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 = 74638534099 and 74638534108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74638534151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7758719 + ... + 7768332.

It is an arithmetic number, because the mean of its divisors is an integer number (5589738720).

Almost surely, 2^74638534157 is an apocalyptic number.

It is an amenable number.

74638534157 is a deficient number, since it is larger than the sum of its proper divisors (14797285363).

74638534157 is a wasteful number, since it uses less digits than its factorization.

74638534157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15527104.

The product of its digits is 8467200, while the sum is 53.

The spelling of 74638534157 in words is "seventy-four billion, six hundred thirty-eight million, five hundred thirty-four thousand, one hundred fifty-seven".