53615690 has 8 divisors (see below), whose sum is σ = 96508260. Its totient is φ = 21446272.

The previous prime is 53615687. The next prime is 53615699. The reversal of 53615690 is 9651635.

It can be written as a sum of positive squares in 2 ways, for example, as 44209201 + 9406489 = 6649^2 + 3067^2 .

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

It is a super-2 number, since 2×53615690² = 5749284428352200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53615690.

It is not an unprimeable number, because it can be changed into a prime (53615699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2680775 + ... + 2680794.

Almost surely, 2^53615690 is an apocalyptic number.

53615690 is a deficient number, since it is larger than the sum of its proper divisors (42892570).

53615690 is a wasteful number, since it uses less digits than its factorization.

53615690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361576.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 53615690 is about 7322.2735540268. The cubic root of 53615690 is about 377.0775122232.

The spelling of 53615690 in words is "fifty-three million, six hundred fifteen thousand, six hundred ninety".