1240405512051 has 48 divisors (see below), whose sum is σ = 1756411188480. Its totient is φ = 777185481600.

The previous prime is 1240405512043. The next prime is 1240405512067. The reversal of 1240405512051 is 1502155040421.

It is not a de Polignac number, because 1240405512051 - 2³ = 1240405512043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240405512001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 315542556 + ... + 315546486.

It is an arithmetic number, because the mean of its divisors is an integer number (36591899760).

Almost surely, 2^{1240405512051} is an apocalyptic number.

1240405512051 is a deficient number, since it is larger than the sum of its proper divisors (516005676429).

1240405512051 is a wasteful number, since it uses less digits than its factorization.

1240405512051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308 (or 5247 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 1240405512051 in words is "one trillion, two hundred forty billion, four hundred five million, five hundred twelve thousand, fifty-one".