1621462316240 has 40 divisors (see below), whose sum is σ = 4059892186728. Its totient is φ = 598693777920.

The previous prime is 1621462316219. The next prime is 1621462316297. The reversal of 1621462316240 is 426132641261.

It can be written as a sum of positive squares in 4 ways, for example, as 5238285376 + 1616224030864 = 72376^2 + 1271308^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1621462316194 and 1621462316203.

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, 779548151 + ... + 779550230.

Almost surely, 2^{1621462316240} is an apocalyptic number.

1621462316240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1621462316240 is an abundant number, since it is smaller than the sum of its proper divisors (2438429870488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621462316240 is a wasteful number, since it uses less digits than its factorization.

1621462316240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559098407 (or 1559098401 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 1621462316240 in words is "one trillion, six hundred twenty-one billion, four hundred sixty-two million, three hundred sixteen thousand, two hundred forty".