61406147421 has 24 divisors (see below), whose sum is σ = 90039515904. Its totient is φ = 40318407360.

The previous prime is 61406147419. The next prime is 61406147441. The reversal of 61406147421 is 12474160416.

It is a happy number.

61406147421 is a `hidden beast` number, since 6 + 14 + 0 + 614 + 7 + 4 + 21 = 666.

It is not a de Polignac number, because 61406147421 - 2¹ = 61406147419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61406147441) 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, 5609065 + ... + 5620001.

It is an arithmetic number, because the mean of its divisors is an integer number (3751646496).

Almost surely, 2^61406147421 is an apocalyptic number.

It is an amenable number.

61406147421 is a deficient number, since it is larger than the sum of its proper divisors (28633368483).

61406147421 is a wasteful number, since it uses less digits than its factorization.

61406147421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20321 (or 20318 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 61406147421 in words is "sixty-one billion, four hundred six million, one hundred forty-seven thousand, four hundred twenty-one".