1351644501660 has 24 divisors (see below), whose sum is σ = 3784604604816. Its totient is φ = 360438533760.

The previous prime is 1351644501637. The next prime is 1351644501667. The reversal of 1351644501660 is 661054461531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351644501667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11263704121 + ... + 11263704240.

It is an arithmetic number, because the mean of its divisors is an integer number (157691858534).

Almost surely, 2^{1351644501660} is an apocalyptic number.

1351644501660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351644501660 is an abundant number, since it is smaller than the sum of its proper divisors (2432960103156).

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

1351644501660 is a wasteful number, since it uses less digits than its factorization.

1351644501660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22527408373 (or 22527408371 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 1351644501660 in words is "one trillion, three hundred fifty-one billion, six hundred forty-four million, five hundred one thousand, six hundred sixty".