64415406613551 has 32 divisors (see below), whose sum is σ = 103946170821120. Its totient is φ = 34638436448256.

The previous prime is 64415406613511. The next prime is 64415406613553. The reversal of 64415406613551 is 15531660451446.

It is not a de Polignac number, because 64415406613551 - 2⁶ = 64415406613487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 64415406613494 and 64415406613503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64415406613553) 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, 10986261 + ... + 15796478.

It is an arithmetic number, because the mean of its divisors is an integer number (3248317838160).

Almost surely, 2^{64415406613551} is an apocalyptic number.

64415406613551 is a deficient number, since it is larger than the sum of its proper divisors (39530764207569).

64415406613551 is a wasteful number, since it uses less digits than its factorization.

64415406613551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26789503.

The product of its (nonzero) digits is 5184000, while the sum is 51.

The spelling of 64415406613551 in words is "sixty-four trillion, four hundred fifteen billion, four hundred six million, six hundred thirteen thousand, five hundred fifty-one".