1551503648997 has 14 divisors (see below), whose sum is σ = 2326191343142. Its totient is φ = 1034335765512.

The previous prime is 1551503648951. The next prime is 1551503649043. The reversal of 1551503648997 is 7998463051551.

1551503648997 is a `hidden beast` number, since 1 + 5 + 515 + 0 + 36 + 4 + 89 + 9 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1551503648951) and next prime (1551503649043).

It can be written as a sum of positive squares in only one way, i.e., 1030521401316 + 520982247681 = 1015146^2 + 721791^2 .

It is not a de Polignac number, because 1551503648997 - 2¹¹ = 1551503646949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551503648297) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1064130718 + ... + 1064132175.

Almost surely, 2^{1551503648997} is an apocalyptic number.

It is an amenable number.

1551503648997 is a deficient number, since it is larger than the sum of its proper divisors (774687694145).

1551503648997 is an frugal number, since it uses more digits than its factorization.

1551503648997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128262911 (or 2128262896 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 63.

The spelling of 1551503648997 in words is "one trillion, five hundred fifty-one billion, five hundred three million, six hundred forty-eight thousand, nine hundred ninety-seven".