1491722570140 has 96 divisors (see below), whose sum is σ = 3511645679808. Its totient is φ = 527500800000.

The previous prime is 1491722570137. The next prime is 1491722570153. The reversal of 1491722570140 is 410752271941.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15425940 + ... + 15522340.

It is an arithmetic number, because the mean of its divisors is an integer number (36579642498).

Almost surely, 2^{1491722570140} is an apocalyptic number.

1491722570140 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 1491722570140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755822839904).

1491722570140 is an abundant number, since it is smaller than the sum of its proper divisors (2019923109668).

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

1491722570140 is a wasteful number, since it uses less digits than its factorization.

1491722570140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98359 (or 98357 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 1491722570140 in words is "one trillion, four hundred ninety-one billion, seven hundred twenty-two million, five hundred seventy thousand, one hundred forty".