1651816200870 has 256 divisors, whose sum is σ = 5082912000000. Its totient is φ = 377781719040.

The previous prime is 1651816200833. The next prime is 1651816200871. The reversal of 1651816200870 is 780026181561.

1651816200870 is a `hidden beast` number, since 1 + 6 + 5 + 18 + 1 + 620 + 0 + 8 + 7 + 0 = 666.

It is a super-2 number, since 2×1651816200870² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651816200871) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4821006 + ... + 5152254.

It is an arithmetic number, because the mean of its divisors is an integer number (19855125000).

Almost surely, 2^{1651816200870} is an apocalyptic number.

1651816200870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1651816200870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2541456000000).

1651816200870 is an abundant number, since it is smaller than the sum of its proper divisors (3431095799130).

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

1651816200870 is a wasteful number, since it uses less digits than its factorization.

1651816200870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331372 (or 331366 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 1651816200870 in words is "one trillion, six hundred fifty-one billion, eight hundred sixteen million, two hundred thousand, eight hundred seventy".