1645456152740 has 24 divisors (see below), whose sum is σ = 3455848783800. Its totient is φ = 658108011008.

The previous prime is 1645456152713. The next prime is 1645456152761. The reversal of 1645456152740 is 472516545461.

It can be written as a sum of positive squares in 4 ways, for example, as 44456879104 + 1600999273636 = 210848^2 + 1265306^2 .

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, 4471727 + ... + 4825686.

It is an arithmetic number, because the mean of its divisors is an integer number (143993699325).

Almost surely, 2^{1645456152740} is an apocalyptic number.

1645456152740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1645456152740 is an abundant number, since it is smaller than the sum of its proper divisors (1810392631060).

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

1645456152740 is a wasteful number, since it uses less digits than its factorization.

1645456152740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9306271 (or 9306269 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 1645456152740 in words is "one trillion, six hundred forty-five billion, four hundred fifty-six million, one hundred fifty-two thousand, seven hundred forty".