51548461902 has 48 divisors (see below), whose sum is σ = 133193548800. Its totient is φ = 14087777616.

The previous prime is 51548461897. The next prime is 51548461907. The reversal of 51548461902 is 20916484515.

51548461902 is a `hidden beast` number, since 51 + 54 + 8 + 461 + 90 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (51548461897) and next prime (51548461907).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51548461907) 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, 8890902 + ... + 8896697.

It is an arithmetic number, because the mean of its divisors is an integer number (2774865600).

Almost surely, 2^51548461902 is an apocalyptic number.

51548461902 is an abundant number, since it is smaller than the sum of its proper divisors (81645086898).

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

51548461902 is a wasteful number, since it uses less digits than its factorization.

51548461902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17787637 (or 17787634 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 51548461902 in words is "fifty-one billion, five hundred forty-eight million, four hundred sixty-one thousand, nine hundred two".