15400948540 has 24 divisors (see below), whose sum is σ = 32628209040. Its totient is φ = 6105861888.

The previous prime is 15400948517. The next prime is 15400948609. The reversal of 15400948540 is 4584900451.

It is a junction number, because it is equal to n+sod(n) for n = 15400948493 and 15400948502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3405030 + ... + 3409549.

It is an arithmetic number, because the mean of its divisors is an integer number (1359508710).

Almost surely, 2^15400948540 is an apocalyptic number.

15400948540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15400948540 is an abundant number, since it is smaller than the sum of its proper divisors (17227260500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15400948540 is a wasteful number, since it uses less digits than its factorization.

15400948540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814701 (or 6814699 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 15400948540 in words is "fifteen billion, four hundred million, nine hundred forty-eight thousand, five hundred forty".