78465515480254 has 64 divisors (see below), whose sum is σ = 145902271600512. Its totient is φ = 30877223731200.

The previous prime is 78465515480251. The next prime is 78465515480281. The reversal of 78465515480254 is 45208451556487.

It is a super-2 number, since 2×78465515480254² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78465515480251) 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, 522885474 + ... + 523035514.

It is an arithmetic number, because the mean of its divisors is an integer number (2279722993758).

Almost surely, 2^{78465515480254} is an apocalyptic number.

78465515480254 is a deficient number, since it is larger than the sum of its proper divisors (67436756120258).

78465515480254 is a wasteful number, since it uses less digits than its factorization.

78465515480254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203701.

The product of its (nonzero) digits is 215040000, while the sum is 64.

The spelling of 78465515480254 in words is "seventy-eight trillion, four hundred sixty-five billion, five hundred fifteen million, four hundred eighty thousand, two hundred fifty-four".