1615640156042 has 8 divisors (see below), whose sum is σ = 2643774800832. Its totient is φ = 734381889100.

The previous prime is 1615640156023. The next prime is 1615640156083. The reversal of 1615640156042 is 2406510465161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1615640156042² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36719094434 + ... + 36719094477.

It is an arithmetic number, because the mean of its divisors is an integer number (330471850104).

Almost surely, 2^{1615640156042} is an apocalyptic number.

1615640156042 is a deficient number, since it is larger than the sum of its proper divisors (1028134644790).

1615640156042 is a wasteful number, since it uses less digits than its factorization.

1615640156042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73438188924.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 1615640156042 in words is "one trillion, six hundred fifteen billion, six hundred forty million, one hundred fifty-six thousand, forty-two".