1515906945 has 48 divisors (see below), whose sum is σ = 3006037632. Its totient is φ = 692271360.

The previous prime is 1515906943. The next prime is 1515906961. The reversal of 1515906945 is 5496095151.

It is a happy number.

1515906945 is a `hidden beast` number, since 1 + 51 + 590 + 6 + 9 + 4 + 5 = 666.

It is not a de Polignac number, because 1515906945 - 2¹ = 1515906943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1515906945.

It is not an unprimeable number, because it can be changed into a prime (1515906943) 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, 414294 + ... + 417936.

It is an arithmetic number, because the mean of its divisors is an integer number (62625784).

Almost surely, 2^1515906945 is an apocalyptic number.

1515906945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1515906945 is a deficient number, since it is larger than the sum of its proper divisors (1490130687).

1515906945 is a wasteful number, since it uses less digits than its factorization.

1515906945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982 (or 4979 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The square root of 1515906945 is about 38934.6496709550. The cubic root of 1515906945 is about 1148.7464462887.

The spelling of 1515906945 in words is "one billion, five hundred fifteen million, nine hundred six thousand, nine hundred forty-five".