1620246511742 has 16 divisors (see below), whose sum is σ = 2456244756000. Its totient is φ = 801503835648.

The previous prime is 1620246511727. The next prime is 1620246511777. The reversal of 1620246511742 is 2471156420261.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1620246511742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810623 + ... + 1974234.

It is an arithmetic number, because the mean of its divisors is an integer number (153515297250).

Almost surely, 2^{1620246511742} is an apocalyptic number.

1620246511742 is a deficient number, since it is larger than the sum of its proper divisors (835998244258).

1620246511742 is a wasteful number, since it uses less digits than its factorization.

1620246511742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787955.

The product of its (nonzero) digits is 161280, while the sum is 41.

It can be divided in two parts, 162024 and 6511742, that added together give a palindrome (6673766).

The spelling of 1620246511742 in words is "one trillion, six hundred twenty billion, two hundred forty-six million, five hundred eleven thousand, seven hundred forty-two".