73778511 has 8 divisors (see below), whose sum is σ = 98434480. Its totient is φ = 49154112.

The previous prime is 73778489. The next prime is 73778519. The reversal of 73778511 is 11587737.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73778511 - 2⁵ = 73778479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73778511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73778519) 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, 1756 + ... + 12273.

It is an arithmetic number, because the mean of its divisors is an integer number (12304310).

Almost surely, 2^73778511 is an apocalyptic number.

73778511 is a deficient number, since it is larger than the sum of its proper divisors (24655969).

73778511 is a wasteful number, since it uses less digits than its factorization.

73778511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15785.

The product of its digits is 41160, while the sum is 39.

The square root of 73778511 is about 8589.4418328550. The cubic root of 73778511 is about 419.4143595099.

The spelling of 73778511 in words is "seventy-three million, seven hundred seventy-eight thousand, five hundred eleven".