1649155515 has 48 divisors (see below), whose sum is σ = 3168506880. Its totient is φ = 729570240.

The previous prime is 1649155513. The next prime is 1649155517. The reversal of 1649155515 is 5155519461.

It is a happy number.

1649155515 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1649155513) and next prime (1649155517).

It is not a de Polignac number, because 1649155515 - 2¹ = 1649155513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1649155513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13405 + ... + 58974.

It is an arithmetic number, because the mean of its divisors is an integer number (66010560).

Almost surely, 2^1649155515 is an apocalyptic number.

1649155515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1649155515 is a deficient number, since it is larger than the sum of its proper divisors (1519351365).

1649155515 is a wasteful number, since it uses less digits than its factorization.

1649155515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72432 (or 72425 counting only the distinct ones).

The product of its digits is 135000, while the sum is 42.

The square root of 1649155515 is about 40609.7958010133. The cubic root of 1649155515 is about 1181.4641203070.

The spelling of 1649155515 in words is "one billion, six hundred forty-nine million, one hundred fifty-five thousand, five hundred fifteen".