72235741545 has 128 divisors (see below), whose sum is σ = 146570342400. Its totient is φ = 33412262400.

The previous prime is 72235741519. The next prime is 72235741559. The reversal of 72235741545 is 54514753227.

72235741545 is a `hidden beast` number, since 7 + 2 + 2 + 35 + 74 + 1 + 545 = 666.

It is not a de Polignac number, because 72235741545 - 2⁶ = 72235741481 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72235741545.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13966810 + ... + 13971980.

It is an arithmetic number, because the mean of its divisors is an integer number (1145080800).

Almost surely, 2^72235741545 is an apocalyptic number.

It is an amenable number.

72235741545 is an abundant number, since it is smaller than the sum of its proper divisors (74334600855).

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

72235741545 is a wasteful number, since it uses less digits than its factorization.

72235741545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628 (or 5622 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 45.

The spelling of 72235741545 in words is "seventy-two billion, two hundred thirty-five million, seven hundred forty-one thousand, five hundred forty-five".