72061755 has 16 divisors (see below), whose sum is σ = 118415904. Its totient is φ = 37393920.

The previous prime is 72061739. The next prime is 72061757. The reversal of 72061755 is 55716027.

It is not a de Polignac number, because 72061755 - 2⁴ = 72061739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72061757) 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, 64366 + ... + 65475.

It is an arithmetic number, because the mean of its divisors is an integer number (7400994).

Almost surely, 2^72061755 is an apocalyptic number.

72061755 is a deficient number, since it is larger than the sum of its proper divisors (46354149).

72061755 is a wasteful number, since it uses less digits than its factorization.

72061755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129886.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 72061755 is about 8488.9195425566. The cubic root of 72061755 is about 416.1356709698.

The spelling of 72061755 in words is "seventy-two million, sixty-one thousand, seven hundred fifty-five".