1540015400007 has 24 divisors (see below), whose sum is σ = 2542467691296. Its totient is φ = 879932630016.

The previous prime is 1540015399987. The next prime is 1540015400023. The reversal of 1540015400007 is 7000045100451.

It is a happy number.

It is not a de Polignac number, because 1540015400007 - 2⁶ = 1540015399943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540015400057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320238 + ... + 1783979.

It is an arithmetic number, because the mean of its divisors is an integer number (105936153804).

Almost surely, 2^{1540015400007} is an apocalyptic number.

1540015400007 is a deficient number, since it is larger than the sum of its proper divisors (1002452291289).

1540015400007 is a wasteful number, since it uses less digits than its factorization.

1540015400007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115847 (or 2115844 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The spelling of 1540015400007 in words is "one trillion, five hundred forty billion, fifteen million, four hundred thousand, seven".