1240357906551 has 8 divisors (see below), whose sum is σ = 1653818834304. Its totient is φ = 826901124920.

The previous prime is 1240357906537. The next prime is 1240357906597. The reversal of 1240357906551 is 1556097530421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240357906551 - 2¹¹ = 1240357904503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240357906551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240357906751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254115 + ... + 1595396.

It is an arithmetic number, because the mean of its divisors is an integer number (206727354288).

Almost surely, 2^{1240357906551} is an apocalyptic number.

1240357906551 is a deficient number, since it is larger than the sum of its proper divisors (413460927753).

1240357906551 is a wasteful number, since it uses less digits than its factorization.

1240357906551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073061.

The product of its (nonzero) digits is 1134000, while the sum is 48.

The spelling of 1240357906551 in words is "one trillion, two hundred forty billion, three hundred fifty-seven million, nine hundred six thousand, five hundred fifty-one".