73736551 has 16 divisors (see below), whose sum is σ = 88602624. Its totient is φ = 59995584.

The previous prime is 73736543. The next prime is 73736557. The reversal of 73736551 is 15563737.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 73736551 - 2³ = 73736543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73736551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73736557) 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, 20386 + ... + 23728.

It is an arithmetic number, because the mean of its divisors is an integer number (5537664).

Almost surely, 2^73736551 is an apocalyptic number.

73736551 is a deficient number, since it is larger than the sum of its proper divisors (14866073).

73736551 is a wasteful number, since it uses less digits than its factorization.

73736551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510.

The product of its digits is 66150, while the sum is 37.

The square root of 73736551 is about 8586.9989519040. The cubic root of 73736551 is about 419.3348333551.

It can be divided in two parts, 7373 and 6551, that added together give a square (13924 = 118²).

The spelling of 73736551 in words is "seventy-three million, seven hundred thirty-six thousand, five hundred fifty-one".