1649164749380 has 72 divisors (see below), whose sum is σ = 3692528843136. Its totient is φ = 618570432000.

The previous prime is 1649164749371. The next prime is 1649164749389. The reversal of 1649164749380 is 839474619461.

It is an interprime number because it is at equal distance from previous prime (1649164749371) and next prime (1649164749389).

It is not an unprimeable number, because it can be changed into a prime (1649164749389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1039955 + ... + 2092805.

Almost surely, 2^{1649164749380} is an apocalyptic number.

1649164749380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649164749380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1846264421568).

1649164749380 is an abundant number, since it is smaller than the sum of its proper divisors (2043364093756).

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

1649164749380 is a wasteful number, since it uses less digits than its factorization.

1649164749380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053165 (or 1053146 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 62.

The spelling of 1649164749380 in words is "one trillion, six hundred forty-nine billion, one hundred sixty-four million, seven hundred forty-nine thousand, three hundred eighty".