651065115561 has 16 divisors (see below), whose sum is σ = 992118482304. Its totient is φ = 372029986944.

The previous prime is 651065115559. The next prime is 651065115611. The reversal of 651065115561 is 165511560156.

It is not a de Polignac number, because 651065115561 - 2¹ = 651065115559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (651065115661) 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, 922285 + ... + 1467221.

It is an arithmetic number, because the mean of its divisors is an integer number (62007405144).

Almost surely, 2^651065115561 is an apocalyptic number.

It is an amenable number.

651065115561 is a deficient number, since it is larger than the sum of its proper divisors (341053366743).

651065115561 is a wasteful number, since it uses less digits than its factorization.

651065115561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601840.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 651065115561 in words is "six hundred fifty-one billion, sixty-five million, one hundred fifteen thousand, five hundred sixty-one".