5651661015 has 192 divisors, whose sum is σ = 13512425472. Its totient is φ = 2108851200.

The previous prime is 5651661007. The next prime is 5651661061. The reversal of 5651661015 is 5101661565.

It is not a de Polignac number, because 5651661015 - 2³ = 5651661007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1664970 + ... + 1668360.

It is an arithmetic number, because the mean of its divisors is an integer number (70377216).

Almost surely, 2^5651661015 is an apocalyptic number.

5651661015 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5651661015 is an abundant number, since it is smaller than the sum of its proper divisors (7860764457).

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

5651661015 is a wasteful number, since it uses less digits than its factorization.

5651661015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470 (or 3467 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 5651661015 is about 75177.5299873573. The cubic root of 5651661015 is about 1781.2520138851.

It can be divided in two parts, 5651 and 661015, that added together give a palindrome (666666).

The spelling of 5651661015 in words is "five billion, six hundred fifty-one million, six hundred sixty-one thousand, fifteen".