55590721502 has 8 divisors (see below), whose sum is σ = 83387427312. Its totient is φ = 27794912400.

The previous prime is 55590721481. The next prime is 55590721513. The reversal of 55590721502 is 20512709555.

It is a happy number.

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

It is a super-2 number, since 2×55590721502² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55590721502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38399 + ... + 335642.

It is an arithmetic number, because the mean of its divisors is an integer number (10423428414).

Almost surely, 2^55590721502 is an apocalyptic number.

55590721502 is a deficient number, since it is larger than the sum of its proper divisors (27796705810).

55590721502 is a wasteful number, since it uses less digits than its factorization.

55590721502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448354.

The product of its (nonzero) digits is 157500, while the sum is 41.

The spelling of 55590721502 in words is "fifty-five billion, five hundred ninety million, seven hundred twenty-one thousand, five hundred two".