1651400663040 has 448 divisors, whose sum is σ = 5996398187520. Its totient is φ = 430990295040.

The previous prime is 1651400663039. The next prime is 1651400663051. The reversal of 1651400663040 is 403660041561.

It is a happy number.

1651400663040 is a `hidden beast` number, since 1 + 6 + 5 + 14 + 0 + 0 + 6 + 630 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1651400662986 and 1651400663004.

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, 51962355 + ... + 51994125.

Almost surely, 2^{1651400663040} is an apocalyptic number.

1651400663040 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 1651400663040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2998199093760).

1651400663040 is an abundant number, since it is smaller than the sum of its proper divisors (4344997524480).

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

1651400663040 is an equidigital number, since it uses as much as digits as its factorization.

1651400663040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31858 (or 31828 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 1651400663040 in words is "one trillion, six hundred fifty-one billion, four hundred million, six hundred sixty-three thousand, forty".