72678551 has 16 divisors (see below), whose sum is σ = 83566080. Its totient is φ = 62562720.

The previous prime is 72678547. The next prime is 72678563. The reversal of 72678551 is 15587627.

It is not a de Polignac number, because 72678551 - 2² = 72678547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72678499 and 72678508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72678521) 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, 24665 + ... + 27453.

It is an arithmetic number, because the mean of its divisors is an integer number (5222880).

Almost surely, 2^72678551 is an apocalyptic number.

72678551 is a deficient number, since it is larger than the sum of its proper divisors (10887529).

72678551 is a wasteful number, since it uses less digits than its factorization.

72678551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926.

The product of its digits is 117600, while the sum is 41.

The square root of 72678551 is about 8525.1716111759. The cubic root of 72678551 is about 417.3195720783.

The spelling of 72678551 in words is "seventy-two million, six hundred seventy-eight thousand, five hundred fifty-one".