2545401520 has 40 divisors (see below), whose sum is σ = 5927325984. Its totient is φ = 1016566272.

The previous prime is 2545401491. The next prime is 2545401539. The reversal of 2545401520 is 251045452.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27172 + ... + 76348.

Almost surely, 2^2545401520 is an apocalyptic number.

2545401520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545401520 is an abundant number, since it is smaller than the sum of its proper divisors (3381924464).

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

2545401520 is a wasteful number, since it uses less digits than its factorization.

2545401520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49837 (or 49831 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 2545401520 is about 50451.9724094113. The cubic root of 2545401520 is about 1365.3754811521.

Adding to 2545401520 its reverse (251045452), we get a palindrome (2796446972).

The spelling of 2545401520 in words is "two billion, five hundred forty-five million, four hundred one thousand, five hundred twenty".