2001542655 has 32 divisors (see below), whose sum is σ = 3678580224. Its totient is φ = 910336896.

The previous prime is 2001542579. The next prime is 2001542663. The reversal of 2001542655 is 5562451002.

It is not a de Polignac number, because 2001542655 - 2⁷ = 2001542527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27697 + ... + 69066.

It is an arithmetic number, because the mean of its divisors is an integer number (114955632).

Almost surely, 2^2001542655 is an apocalyptic number.

2001542655 is a deficient number, since it is larger than the sum of its proper divisors (1677037569).

2001542655 is a wasteful number, since it uses less digits than its factorization.

2001542655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96975.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2001542655 is about 44738.6036326571. The cubic root of 2001542655 is about 1260.2449038945.

Adding to 2001542655 its reverse (5562451002), we get a palindrome (7563993657).

The spelling of 2001542655 in words is "two billion, one million, five hundred forty-two thousand, six hundred fifty-five".