551661606510 has 64 divisors (see below), whose sum is σ = 1513352028672. Its totient is φ = 126075494016.

The previous prime is 551661606443. The next prime is 551661606511. The reversal of 551661606510 is 15606166155.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551661606511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1260304 + ... + 1640636.

It is an arithmetic number, because the mean of its divisors is an integer number (23646125448).

Almost surely, 2^551661606510 is an apocalyptic number.

551661606510 is an abundant number, since it is smaller than the sum of its proper divisors (961690422162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551661606510 is a wasteful number, since it uses less digits than its factorization.

551661606510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387257.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 551661606510 in words is "five hundred fifty-one billion, six hundred sixty-one million, six hundred six thousand, five hundred ten".