1642651215 has 8 divisors (see below), whose sum is σ = 2628241968. Its totient is φ = 876080640.

The previous prime is 1642651189. The next prime is 1642651217. The reversal of 1642651215 is 5121562461.

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

It is not a de Polignac number, because 1642651215 - 2⁶ = 1642651151 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642651217) 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, 54755026 + ... + 54755055.

It is an arithmetic number, because the mean of its divisors is an integer number (328530246).

Almost surely, 2^1642651215 is an apocalyptic number.

1642651215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1642651215 is a deficient number, since it is larger than the sum of its proper divisors (985590753).

1642651215 is a wasteful number, since it uses less digits than its factorization.

1642651215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109510089.

The product of its digits is 14400, while the sum is 33.

The square root of 1642651215 is about 40529.6337881309. The cubic root of 1642651215 is about 1179.9088350042.

The spelling of 1642651215 in words is "one billion, six hundred forty-two million, six hundred fifty-one thousand, two hundred fifteen".