1649699970 has 32 divisors (see below), whose sum is σ = 3976585920. Its totient is φ = 437997120.

The previous prime is 1649699969. The next prime is 1649699971. The reversal of 1649699970 is 799969461.

It is an interprime number because it is at equal distance from previous prime (1649699969) and next prime (1649699971).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1649699971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113196 + ... + 126935.

It is an arithmetic number, because the mean of its divisors is an integer number (124268310).

Almost surely, 2^1649699970 is an apocalyptic number.

1649699970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1649699970 is an abundant number, since it is smaller than the sum of its proper divisors (2326885950).

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

1649699970 is a wasteful number, since it uses less digits than its factorization.

1649699970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240370.

The product of its (nonzero) digits is 6613488, while the sum is 60.

The square root of 1649699970 is about 40616.4987412751. The cubic root of 1649699970 is about 1181.5941228581.

The spelling of 1649699970 in words is "one billion, six hundred forty-nine million, six hundred ninety-nine thousand, nine hundred seventy".