1951545607648 has 96 divisors (see below), whose sum is σ = 4731486008256. Its totient is φ = 771592531968.

The previous prime is 1951545607619. The next prime is 1951545607657. The reversal of 1951545607648 is 8467065451591.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4853140 + ... + 5239852.

It is an arithmetic number, because the mean of its divisors is an integer number (49286312586).

Almost surely, 2^{1951545607648} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1951545607648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2365743004128).

1951545607648 is an abundant number, since it is smaller than the sum of its proper divisors (2779940400608).

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

1951545607648 is a wasteful number, since it uses less digits than its factorization.

1951545607648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388476 (or 388468 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 61.

The spelling of 1951545607648 in words is "one trillion, nine hundred fifty-one billion, five hundred forty-five million, six hundred seven thousand, six hundred forty-eight".