72754875778 has 16 divisors (see below), whose sum is σ = 120703516920. Its totient is φ = 32671627776.

The previous prime is 72754875763. The next prime is 72754875779. The reversal of 72754875778 is 87757845727.

It can be written as a sum of positive squares in 4 ways, for example, as 71568555529 + 1186320249 = 267523^2 + 34443^2 .

It is a super-2 number, since 2×72754875778² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72754875779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37813423 + ... + 37815346.

Almost surely, 2^72754875778 is an apocalyptic number.

72754875778 is a deficient number, since it is larger than the sum of its proper divisors (47948641142).

72754875778 is a wasteful number, since it uses less digits than its factorization.

72754875778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75628821.

The product of its digits is 215129600, while the sum is 67.

The spelling of 72754875778 in words is "seventy-two billion, seven hundred fifty-four million, eight hundred seventy-five thousand, seven hundred seventy-eight".