1540773657632 has 72 divisors (see below), whose sum is σ = 3339802368000. Its totient is φ = 699181408640.

The previous prime is 1540773657617. The next prime is 1540773657671. The reversal of 1540773657632 is 2367563770451.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1987169 + ... + 2651487.

It is an arithmetic number, because the mean of its divisors is an integer number (46386144000).

Almost surely, 2^{1540773657632} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540773657632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669901184000).

1540773657632 is an abundant number, since it is smaller than the sum of its proper divisors (1799028710368).

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

1540773657632 is a wasteful number, since it uses less digits than its factorization.

1540773657632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664950 (or 664931 counting only the distinct ones).

The product of its (nonzero) digits is 22226400, while the sum is 56.

The spelling of 1540773657632 in words is "one trillion, five hundred forty billion, seven hundred seventy-three million, six hundred fifty-seven thousand, six hundred thirty-two".