1972845536 has 12 divisors (see below), whose sum is σ = 3884039712. Its totient is φ = 986422752.

The previous prime is 1972845533. The next prime is 1972845551. The reversal of 1972845536 is 6355482791.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972845533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825680 + ... + 30825743.

It is an arithmetic number, because the mean of its divisors is an integer number (323669976).

Almost surely, 2^1972845536 is an apocalyptic number.

1972845536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1972845536 is a deficient number, since it is larger than the sum of its proper divisors (1911194176).

1972845536 is an equidigital number, since it uses as much as digits as its factorization.

1972845536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61651433 (or 61651425 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

The square root of 1972845536 is about 44416.7258586222. The cubic root of 1972845536 is about 1254.1929671748.

The spelling of 1972845536 in words is "one billion, nine hundred seventy-two million, eight hundred forty-five thousand, five hundred thirty-six".