102090791478 has 64 divisors (see below), whose sum is σ = 227801935872. Its totient is φ = 30289299840.

The previous prime is 102090791459. The next prime is 102090791501. The reversal of 102090791478 is 874197090201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 593575 + ... + 745997.

It is an arithmetic number, because the mean of its divisors is an integer number (3559405248).

Almost surely, 2^102090791478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102090791478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113900967936).

102090791478 is an abundant number, since it is smaller than the sum of its proper divisors (125711144394).

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

102090791478 is a wasteful number, since it uses less digits than its factorization.

102090791478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152749.

The product of its (nonzero) digits is 254016, while the sum is 48.

The spelling of 102090791478 in words is "one hundred two billion, ninety million, seven hundred ninety-one thousand, four hundred seventy-eight".