651101561055 has 24 divisors (see below), whose sum is σ = 1231173861840. Its totient is φ = 315685605120.

The previous prime is 651101561051. The next prime is 651101561069. The reversal of 651101561055 is 550165101156.

It is a happy number.

It is not a de Polignac number, because 651101561055 - 2² = 651101561051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651101561051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 657677850 + ... + 657678839.

It is an arithmetic number, because the mean of its divisors is an integer number (51298910910).

Almost surely, 2^651101561055 is an apocalyptic number.

651101561055 is a deficient number, since it is larger than the sum of its proper divisors (580072300785).

651101561055 is a wasteful number, since it uses less digits than its factorization.

651101561055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315356711 (or 1315356708 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 651101561055 in words is "six hundred fifty-one billion, one hundred one million, five hundred sixty-one thousand, fifty-five".