1615642023940 has 96 divisors (see below), whose sum is σ = 3952980864000. Its totient is φ = 543251404800.

The previous prime is 1615642023937. The next prime is 1615642023973. The reversal of 1615642023940 is 493202465161.

It is a super-2 number, since 2×1615642023940² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1157740 + ... + 2138140.

It is an arithmetic number, because the mean of its divisors is an integer number (41176884000).

Almost surely, 2^{1615642023940} is an apocalyptic number.

1615642023940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1615642023940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1976490432000).

1615642023940 is an abundant number, since it is smaller than the sum of its proper divisors (2337338840060).

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

1615642023940 is a wasteful number, since it uses less digits than its factorization.

1615642023940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980645 (or 980643 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 1615642023940 in words is "one trillion, six hundred fifteen billion, six hundred forty-two million, twenty-three thousand, nine hundred forty".