53217619650 has 672 divisors, whose sum is σ = 176234970240. Its totient is φ = 11824496640.

The previous prime is 53217619589. The next prime is 53217619661. The reversal of 53217619650 is 5691671235.

53217619650 is a `hidden beast` number, since 5 + 3 + 21 + 7 + 619 + 6 + 5 + 0 = 666.

It is a super-2 number, since 2×53217619650² (a number of 22 digits) contains 22 as substring.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53217619596 and 53217619605.

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 207072322 + ... + 207072578.

It is an arithmetic number, because the mean of its divisors is an integer number (262254420).

Almost surely, 2^53217619650 is an apocalyptic number.

53217619650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 53217619650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88117485120).

53217619650 is an abundant number, since it is smaller than the sum of its proper divisors (123017350590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53217619650 is a wasteful number, since it uses less digits than its factorization.

53217619650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 53217619650 in words is "fifty-three billion, two hundred seventeen million, six hundred nineteen thousand, six hundred fifty".