1491952889952 has 72 divisors (see below), whose sum is σ = 4848846898896. Its totient is φ = 426272253696.

The previous prime is 1491952889939. The next prime is 1491952889983. The reversal of 1491952889952 is 2599882591941.

1491952889952 is a `hidden beast` number, since 1 + 4 + 9 + 1 + 9 + 528 + 8 + 9 + 95 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1491952889952² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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, 370025983 + ... + 370030014.

It is an arithmetic number, because the mean of its divisors is an integer number (67345095818).

Almost surely, 2^{1491952889952} is an apocalyptic number.

1491952889952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1491952889952 is an abundant number, since it is smaller than the sum of its proper divisors (3356894008944).

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

1491952889952 is a wasteful number, since it uses less digits than its factorization.

1491952889952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740056020 (or 740056009 counting only the distinct ones).

The product of its digits is 167961600, while the sum is 72.

The spelling of 1491952889952 in words is "one trillion, four hundred ninety-one billion, nine hundred fifty-two million, eight hundred eighty-nine thousand, nine hundred fifty-two".