73687238281 has 16 divisors (see below), whose sum is σ = 78456400000. Its totient is φ = 69010102656.

The previous prime is 73687238249. The next prime is 73687238291. The reversal of 73687238281 is 18283278637.

It is a cyclic number.

It is not a de Polignac number, because 73687238281 - 2⁵ = 73687238249 is a prime.

It is a super-2 number, since 2×73687238281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73687238201) 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, 868645 + ... + 949693.

It is an arithmetic number, because the mean of its divisors is an integer number (4903525000).

Almost surely, 2^73687238281 is an apocalyptic number.

It is an amenable number.

73687238281 is a deficient number, since it is larger than the sum of its proper divisors (4769161719).

73687238281 is a wasteful number, since it uses less digits than its factorization.

73687238281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81616.

The product of its digits is 5419008, while the sum is 55.

The spelling of 73687238281 in words is "seventy-three billion, six hundred eighty-seven million, two hundred thirty-eight thousand, two hundred eighty-one".