1423820974651 has 4 divisors (see below), whose sum is σ = 1423837273032. Its totient is φ = 1423804676272.

The previous prime is 1423820974619. The next prime is 1423820974717. The reversal of 1423820974651 is 1564790283241.

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

It is a cyclic number.

It is not a de Polignac number, because 1423820974651 - 2⁵ = 1423820974619 is a prime.

It is a super-2 number, since 2×1423820974651² (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 (1423820974951) 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, 8017441 + ... + 8193106.

It is an arithmetic number, because the mean of its divisors is an integer number (355959318258).

It is a 1-persistent number, because it is pandigital, but 2⋅1423820974651 = 2847641949302 is not.

Almost surely, 2^{1423820974651} is an apocalyptic number.

1423820974651 is a deficient number, since it is larger than the sum of its proper divisors (16298381).

1423820974651 is an equidigital number, since it uses as much as digits as its factorization.

1423820974651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16298380.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 1423820974651 in words is "one trillion, four hundred twenty-three billion, eight hundred twenty million, nine hundred seventy-four thousand, six hundred fifty-one".