2545211640 has 32 divisors (see below), whose sum is σ = 7635635280. Its totient is φ = 678723072.

The previous prime is 2545211573. The next prime is 2545211677. The reversal of 2545211640 is 461125452.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2545211598 and 2545211607.

It is a congruent number.

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, 10604929 + ... + 10605168.

Almost surely, 2^2545211640 is an apocalyptic number.

2545211640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545211640 is an abundant number, since it is smaller than the sum of its proper divisors (5090423640).

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

2545211640 is a wasteful number, since it uses less digits than its factorization.

2545211640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21210111 (or 21210107 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2545211640 is about 50450.0905846560. The cubic root of 2545211640 is about 1365.3415292142.

It can be divided in two parts, 2545 and 211640, that added together give a triangular number (214185 = T₆₅₄).

The spelling of 2545211640 in words is "two billion, five hundred forty-five million, two hundred eleven thousand, six hundred forty".