73265789520 has 400 divisors, whose sum is σ = 317254658688. Its totient is φ = 15223956480.

The previous prime is 73265789497. The next prime is 73265789543. The reversal of 73265789520 is 2598756237.

73265789520 is a `hidden beast` number, since 7 + 32 + 6 + 5 + 7 + 89 + 520 = 666.

It is an interprime number because it is at equal distance from previous prime (73265789497) and next prime (73265789543).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 425542 + ... + 572378.

Almost surely, 2^73265789520 is an apocalyptic number.

73265789520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73265789520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158627329344).

73265789520 is an abundant number, since it is smaller than the sum of its proper divisors (243988869168).

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

73265789520 is a wasteful number, since it uses less digits than its factorization.

73265789520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146880 (or 146865 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 73265789520 in words is "seventy-three billion, two hundred sixty-five million, seven hundred eighty-nine thousand, five hundred twenty".