1020623251611 has 4 divisors (see below), whose sum is σ = 1360831002152. Its totient is φ = 680415501072.

The previous prime is 1020623251601. The next prime is 1020623251639. The reversal of 1020623251611 is 1161523260201.

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

It is not a de Polignac number, because 1020623251611 - 2⁶ = 1020623251547 is a prime.

It is a super-2 number, since 2×1020623251611² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020623251601) 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, 170103875266 + ... + 170103875271.

It is an arithmetic number, because the mean of its divisors is an integer number (340207750538).

Almost surely, 2^{1020623251611} is an apocalyptic number.

1020623251611 is a deficient number, since it is larger than the sum of its proper divisors (340207750541).

1020623251611 is an equidigital number, since it uses as much as digits as its factorization.

1020623251611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340207750540.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 1020623251611 in words is "one trillion, twenty billion, six hundred twenty-three million, two hundred fifty-one thousand, six hundred eleven".