2551010661506 has 16 divisors (see below), whose sum is σ = 4013154725184. Its totient is φ = 1213855432944.

The previous prime is 2551010661499. The next prime is 2551010661559. The reversal of 2551010661506 is 6051660101552.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2551010661506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140744120 + ... + 140762243.

It is an arithmetic number, because the mean of its divisors is an integer number (250822170324).

Almost surely, 2^{2551010661506} is an apocalyptic number.

2551010661506 is a deficient number, since it is larger than the sum of its proper divisors (1462144063678).

2551010661506 is a wasteful number, since it uses less digits than its factorization.

2551010661506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281506585.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 2551010661506 in words is "two trillion, five hundred fifty-one billion, ten million, six hundred sixty-one thousand, five hundred six".