40123402461 has 32 divisors (see below), whose sum is σ = 60131867520. Its totient is φ = 26440307712.

The previous prime is 40123402453. The next prime is 40123402477. The reversal of 40123402461 is 16420432104.

It is a happy number.

40123402461 is a `hidden beast` number, since 40 + 123 + 40 + 2 + 461 = 666.

40123402461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40123402461 - 2³ = 40123402453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40123422461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 793606 + ... + 842648.

It is an arithmetic number, because the mean of its divisors is an integer number (1879120860).

Almost surely, 2^40123402461 is an apocalyptic number.

It is an amenable number.

40123402461 is a deficient number, since it is larger than the sum of its proper divisors (20008465059).

40123402461 is a wasteful number, since it uses less digits than its factorization.

40123402461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49402 (or 49396 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 40123402461 its reverse (16420432104), we get a palindrome (56543834565).

The spelling of 40123402461 in words is "forty billion, one hundred twenty-three million, four hundred two thousand, four hundred sixty-one".