651645606546155 has 72 divisors (see below), whose sum is σ = 899831863098000. Its totient is φ = 452737658161152.

The previous prime is 651645606546139. The next prime is 651645606546157. The reversal of 651645606546155 is 551645606546156.

It is not a de Polignac number, because 651645606546155 - 2⁴ = 651645606546139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a junction number, because it is equal to n+sod(n) for n = 651645606546091 and 651645606546100.

It is not an unprimeable number, because it can be changed into a prime (651645606546157) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 648839321 + ... + 649842869.

It is an arithmetic number, because the mean of its divisors is an integer number (12497664765250).

Almost surely, 2^{651645606546155} is an apocalyptic number.

651645606546155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

651645606546155 is a deficient number, since it is larger than the sum of its proper divisors (248186256551845).

651645606546155 is a wasteful number, since it uses less digits than its factorization.

651645606546155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006273 (or 1006243 counting only the distinct ones).

The product of its (nonzero) digits is 388800000, while the sum is 65.

Subtracting from 651645606546155 its reverse (551645606546156), we obtain a palindrome (99999999999999).

The spelling of 651645606546155 in words is "six hundred fifty-one trillion, six hundred forty-five billion, six hundred six million, five hundred forty-six thousand, one hundred fifty-five".