1551006555550 has 48 divisors (see below), whose sum is σ = 2946171366000. Its totient is φ = 607358048000.

The previous prime is 1551006555547. The next prime is 1551006555599. The reversal of 1551006555550 is 555556001551.

It is a junction number, because it is equal to n+sod(n) for n = 1551006555497 and 1551006555506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1276000 + ... + 2174899.

It is an arithmetic number, because the mean of its divisors is an integer number (61378570125).

Almost surely, 2^{1551006555550} is an apocalyptic number.

1551006555550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1551006555550 is a deficient number, since it is larger than the sum of its proper divisors (1395164810450).

1551006555550 is a wasteful number, since it uses less digits than its factorization.

1551006555550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451101 (or 3451096 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 43.

The spelling of 1551006555550 in words is "one trillion, five hundred fifty-one billion, six million, five hundred fifty-five thousand, five hundred fifty".