2071551721623 has 16 divisors (see below), whose sum is σ = 2869790095200. Its totient is φ = 1327589827200.

The previous prime is 2071551721571. The next prime is 2071551721637. The reversal of 2071551721623 is 3261271551702.

It is a happy number.

It is not a de Polignac number, because 2071551721623 - 2⁶ = 2071551721559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2071551721823) 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, 51969028 + ... + 52008873.

It is an arithmetic number, because the mean of its divisors is an integer number (179361880950).

Almost surely, 2^{2071551721623} is an apocalyptic number.

2071551721623 is a deficient number, since it is larger than the sum of its proper divisors (798238373577).

2071551721623 is a wasteful number, since it uses less digits than its factorization.

2071551721623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103978162.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 2071551721623 in words is "two trillion, seventy-one billion, five hundred fifty-one million, seven hundred twenty-one thousand, six hundred twenty-three".