1516671640 has 64 divisors (see below), whose sum is σ = 3726790560. Its totient is φ = 550917120.

The previous prime is 1516671617. The next prime is 1516671647. The reversal of 1516671640 is 461766151.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1516671640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516671647) 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, 708652 + ... + 710788.

Almost surely, 2^1516671640 is an apocalyptic number.

1516671640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1516671640 is an abundant number, since it is smaller than the sum of its proper divisors (2210118920).

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

1516671640 is a wasteful number, since it uses less digits than its factorization.

1516671640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772 (or 3768 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1516671640 is about 38944.4686701462. The cubic root of 1516671640 is about 1148.9395744573.

The spelling of 1516671640 in words is "one billion, five hundred sixteen million, six hundred seventy-one thousand, six hundred forty".