72065172050 has 24 divisors (see below), whose sum is σ = 139869101376. Its totient is φ = 27572761040.

The previous prime is 72065172041. The next prime is 72065172059. The reversal of 72065172050 is 5027156027.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72065172041) and next prime (72065172059).

It is a super-2 number, since 2×72065172050² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72065172050.

It is not an unprimeable number, because it can be changed into a prime (72065172059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31331534 + ... + 31333833.

It is an arithmetic number, because the mean of its divisors is an integer number (5827879224).

Almost surely, 2^72065172050 is an apocalyptic number.

72065172050 is a deficient number, since it is larger than the sum of its proper divisors (67803929326).

72065172050 is a wasteful number, since it uses less digits than its factorization.

72065172050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62665402 (or 62665397 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 72065172050 in words is "seventy-two billion, sixty-five million, one hundred seventy-two thousand, fifty".