72155505706449 has 16 divisors (see below), whose sum is σ = 107790042924480. Its totient is φ = 42548701152960.

The previous prime is 72155505706429. The next prime is 72155505706451. The reversal of 72155505706449 is 94460750555127.

It is not a de Polignac number, because 72155505706449 - 2¹³ = 72155505698257 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72155505706392 and 72155505706401.

It is not an unprimeable number, because it can be changed into a prime (72155505706409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29547707914 + ... + 29547710355.

It is an arithmetic number, because the mean of its divisors is an integer number (6736877682780).

Almost surely, 2^{72155505706449} is an apocalyptic number.

It is an amenable number.

72155505706449 is a deficient number, since it is larger than the sum of its proper divisors (35634537218031).

72155505706449 is a wasteful number, since it uses less digits than its factorization.

72155505706449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59095418320.

The product of its (nonzero) digits is 52920000, while the sum is 60.

The spelling of 72155505706449 in words is "seventy-two trillion, one hundred fifty-five billion, five hundred five million, seven hundred six thousand, four hundred forty-nine".