51540145415 has 12 divisors (see below), whose sum is σ = 67981878552. Its totient is φ = 37483741680.

The previous prime is 51540145409. The next prime is 51540145463. The reversal of 51540145415 is 51454104515.

It is not a de Polignac number, because 51540145415 - 2⁴ = 51540145399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42594557 + ... + 42595766.

It is an arithmetic number, because the mean of its divisors is an integer number (5665156546).

Almost surely, 2^51540145415 is an apocalyptic number.

51540145415 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51540145415 is a deficient number, since it is larger than the sum of its proper divisors (16441733137).

51540145415 is a wasteful number, since it uses less digits than its factorization.

51540145415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85190350 (or 85190339 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 51540145415 in words is "fifty-one billion, five hundred forty million, one hundred forty-five thousand, four hundred fifteen".