1621662157014 has 16 divisors (see below), whose sum is σ = 3243437788080. Its totient is φ = 540535140000.

The previous prime is 1621662156977. The next prime is 1621662157019. The reversal of 1621662157014 is 4107512661261.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621662157019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4541737 + ... + 4885764.

It is an arithmetic number, because the mean of its divisors is an integer number (202714861755).

Almost surely, 2^{1621662157014} is an apocalyptic number.

1621662157014 is an abundant number, since it is smaller than the sum of its proper divisors (1621775631066).

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

1621662157014 is a wasteful number, since it uses less digits than its factorization.

1621662157014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456175.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 1621662157014 in words is "one trillion, six hundred twenty-one billion, six hundred sixty-two million, one hundred fifty-seven thousand, fourteen".