651551115505 has 32 divisors (see below), whose sum is σ = 824331686400. Its totient is φ = 493679569152.

The previous prime is 651551115503. The next prime is 651551115529. The reversal of 651551115505 is 505511155156.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 651551115505 - 2¹ = 651551115503 is a prime.

It is a super-2 number, since 2×651551115505² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (651551115503) 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, 2181579 + ... + 2462191.

It is an arithmetic number, because the mean of its divisors is an integer number (25760365200).

Almost surely, 2^651551115505 is an apocalyptic number.

It is an amenable number.

651551115505 is a deficient number, since it is larger than the sum of its proper divisors (172780570895).

651551115505 is a wasteful number, since it uses less digits than its factorization.

651551115505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280953.

The product of its (nonzero) digits is 93750, while the sum is 40.

The spelling of 651551115505 in words is "six hundred fifty-one billion, five hundred fifty-one million, one hundred fifteen thousand, five hundred five".