5151511506661 has 16 divisors (see below), whose sum is σ = 5568031131264. Its totient is φ = 4737911707584.

The previous prime is 5151511506641. The next prime is 5151511506667. The reversal of 5151511506661 is 1666051151515.

It is a cyclic number.

It is not a de Polignac number, because 5151511506661 - 2¹⁵ = 5151511473893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5151511506667) 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, 4015146 + ... + 5140468.

It is an arithmetic number, because the mean of its divisors is an integer number (348001945704).

Almost surely, 2^{5151511506661} is an apocalyptic number.

It is an amenable number.

5151511506661 is a deficient number, since it is larger than the sum of its proper divisors (416519624603).

5151511506661 is a wasteful number, since it uses less digits than its factorization.

5151511506661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126620.

The product of its (nonzero) digits is 135000, while the sum is 43.

The spelling of 5151511506661 in words is "five trillion, one hundred fifty-one billion, five hundred eleven million, five hundred six thousand, six hundred sixty-one".