651043621355 has 4 divisors (see below), whose sum is σ = 781252345632. Its totient is φ = 520834897080.

The previous prime is 651043621289. The next prime is 651043621357. The reversal of 651043621355 is 553126340156.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 651043621355 - 2¹⁴ = 651043604971 is a prime.

It is a super-2 number, since 2×651043621355² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651043621357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65104362131 + ... + 65104362140.

It is an arithmetic number, because the mean of its divisors is an integer number (195313086408).

Almost surely, 2^651043621355 is an apocalyptic number.

651043621355 is a deficient number, since it is larger than the sum of its proper divisors (130208724277).

651043621355 is a wasteful number, since it uses less digits than its factorization.

651043621355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130208724276.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 651043621355 in words is "six hundred fifty-one billion, forty-three million, six hundred twenty-one thousand, three hundred fifty-five".