1972745652 has 12 divisors (see below), whose sum is σ = 4603073216. Its totient is φ = 657581880.

The previous prime is 1972745633. The next prime is 1972745669. The reversal of 1972745652 is 2565472791.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82197724 + ... + 82197747.

Almost surely, 2^1972745652 is an apocalyptic number.

1972745652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1972745652 is an abundant number, since it is smaller than the sum of its proper divisors (2630327564).

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

1972745652 is a wasteful number, since it uses less digits than its factorization.

1972745652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164395478 (or 164395476 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 48.

The square root of 1972745652 is about 44415.6014481398. The cubic root of 1972745652 is about 1254.1718004688.

The spelling of 1972745652 in words is "one billion, nine hundred seventy-two million, seven hundred forty-five thousand, six hundred fifty-two".