72742497540428 has 24 divisors (see below), whose sum is σ = 127334655504672. Its totient is φ = 36361168187904.

The previous prime is 72742497540407. The next prime is 72742497540457. The reversal of 72742497540428 is 82404579424727.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431179100 + ... + 431347772.

It is an arithmetic number, because the mean of its divisors is an integer number (5305610646028).

Almost surely, 2^{72742497540428} is an apocalyptic number.

It is an amenable number.

72742497540428 is a deficient number, since it is larger than the sum of its proper divisors (54592157964244).

72742497540428 is a wasteful number, since it uses less digits than its factorization.

72742497540428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197921 (or 197919 counting only the distinct ones).

The product of its (nonzero) digits is 252887040, while the sum is 65.

The spelling of 72742497540428 in words is "seventy-two trillion, seven hundred forty-two billion, four hundred ninety-seven million, five hundred forty thousand, four hundred twenty-eight".